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What is non ferromagnetic materials?
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Mar 11, 2018
by
anonymous
What is non ferromagnetic materials?
non-ferromagnetic
materials
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asked
Mar 11, 2018
by
anonymous
What are some ferromagnetic materials?
What are some ferromagnetic materials?
ferromagnetic
materials
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81
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Mar 11, 2018
by
anonymous
What is the meaning of electrical materials?
What is the meaning of electrical materials?
electrical
materials
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87
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Mar 11, 2018
by
anonymous
What materials are diamagnetic?
What materials are diamagnetic?
materials
diamagnetic
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48
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asked
Apr 30, 2018
by
anonymous
_________ is used for heating non -conducting materials.
_______ is used for heating non -conducting materials. (1) Eddy current heating (2) Arc heating (3) Induction heating (4) Dielectric heating
Last answer:
Dielectric heating is used for heating non -conducting materials.
heating
non-conducting
materials
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asked
Jan 6
by
anonymous
Magnetic and Non-magnetic Materials
Magnetic and Non-magnetic Materials
Last answer:
We have now looked at a number of ways in which matter can be grouped, such as into metals, semi-metals and non-metals; electrical conductors and insulators, and thermal conductors and insulators. ... information must be stored, in computers and TV's, as well as in generators and electric motors.
magnetic
and
non-magnetic
materials
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asked
Mar 14, 2018
by
anonymous
What kinds of materials can not electricity pass through?
What kinds of materials can not electricity pass through?
materials
electricity
pass
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50
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asked
Mar 19, 2020
by
anonymous
Classification of insulating materials as per IS 8504- 1994
Classification of insulating materials as per IS 8504- 1994
classification
insulating
materials
is
8504
1994
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asked
Apr 29, 2018
by
anonymous
The ability of materials to become polarized under an applied electric field is called _______
The ability of materials to become polarized under an applied electric field is called _______ A) Ferroelectricity B) Paraelectricity C) Polectricity D) None of these
Last answer:
The ability of materials to become polarized under an applied electric field is called Paraelectricity
materials
polarized
electric
field
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1
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asked
Apr 28, 2018
by
anonymous
The bridge most suited for accurate measurement of relative permittivity of dielectric materials is
The bridge most suited for accurate measurement of relative permittivity of dielectric materials is (A) Carey Foster Bridge (B) Anderson’s bridge (C) Heaviside Bridge modified by Campbell. (D) Schering Bridge.
Last answer:
The bridge most suited for accurate measurement of relative permittivity of dielectric materials is Schering Bridge.
bridge
accurate
measurement
relative
permittivity
dielectric
materials
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1
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asked
May 7, 2020
by
anonymous
State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them.
State the insulating materials used in motor. Write temperature class and withstand temperature ranges for them.
Last answer:
The insulating materials used in motor are as belows: 1. Cotton, 2. Silk, or paper, 3. Press board, 4. Resins 5. PVC 6. Cellulose-Fiber, 7. Enameled coating, etc ... Over 180° Mica, porcelain, ceramics, glass quartz, asbestos, treated glass fiber or treated asbestos. etc.
state
the
insulating
materials
used
in
motor
write
temperature
class
and
withstand
ranges
for
them
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asked
May 7, 2020
by
anonymous
State the type of insulating materials under Class Y and Class B.
State the type of insulating materials under Class Y and Class B.
Last answer:
The type of insulating materials under Class Y : 1. Cotton 2. Silk 3. Paper 4. Rubber 5. PVC The type of insulating materials under Class B: 1. Backelite 2. Impregnated varnish 3. Mica 4. Fiber glass 5. Asbestos
state
the
type
of
insulating
materials
under
class
y
and
b
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53
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asked
May 7, 2020
by
anonymous
List any four materials used for pattern making
List any four materials used for pattern making
Last answer:
The various types of materials used are as follows: 1. Wood 2. Metal. 3. Plastic. 4. Plaster. 5. Wax.
list
any
four
materials
used
for
pattern
making
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asked
Apr 16, 2020
by
anonymous
State factors affecting the life of insulating materials.
State factors affecting the life of insulating materials.
state
factors
affecting
the
life
of
insulating
materials
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asked
Aug 17, 2019
by
anonymous
State properties of insulating materials.
State properties of insulating materials.
Last answer:
(i) Resistivity should be very high. (ii) It should be water resistant. (iii) It should not contain impurities. (iv) It should not be affected chemically and not corroded easily. (v) Its ... It should be mechanically strong (tensile strength should be more). (vii) It should not be porous.
insulating
materials
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asked
Aug 4, 2019
by
anonymous
State any four dielectric materials.
State any four dielectric materials.
Last answer:
Ceramics, distilled water, paper, mica, polyethylene, and glass. Metal oxides
dielectric
materials
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1
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asked
Sep 4, 2018
by
anonymous
Classify electrical materials.
Classify electrical materials.
Last answer:
Classification of electrical materials: i) Conducting Materials ii) Insulating materials iii) Magnetic materials iv) Semiconducting materials
classify
electrical
materials
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58
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1
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asked
Sep 4, 2018
by
anonymous
Explain the mechanical properties of insulating materials.
Explain the mechanical properties of insulating materials.
Last answer:
i) Mechanical strength: Mechanical strength depends on temperature and humidity. a) Temperature: High temperature badly affects the mechanical strength of insulating material. While selecting material ... material should have property of easy moulding and machined into required shape and size.
mechanical
properties
insulating
materials
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40
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1
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asked
Sep 4, 2018
by
anonymous
Classify magnetic materials and explain in brief.
Classify magnetic materials and explain in brief.
Last answer:
.embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { ... the absence of external magnetic field. Following are the ferromagnetic materials: Iron, Cobalt, Nickel.
classify
magnetic
materials
explain
brief
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asked
Sep 4, 2018
by
anonymous
State any four properties of conducting materials.
State any four properties of conducting materials.
Last answer:
Electrical properties of conductivity materials: i) Low resistivity. ii) Low temperature coefficient of resistance. iii) High conductivity. iv) Low heat dissipation. Mechanical properties of ... properties of conductivity materials: i) Adequate resistant to corrosion. ii) Low oxidation.
properties
conducting
materials
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asked
May 8, 2018
by
anonymous
The electric breakdown strength of insulating materials depends on
The electric breakdown strength of insulating materials depends on (A) Nature of applied voltage (B) lmperfection of dielectric material (C) Pressure, temperature and humidity (D) All or these
Last answer:
The electric breakdown strength of insulating materials depends on (A) Nature of applied voltage (B) lmperfection of dielectric material (C) Pressure, temperature and humidity (D) All or these
electric
breakdown
strength
insulating
materials
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asked
Apr 29, 2018
by
anonymous
Magnetostrictive materials can convert ________
Magnetostrictive materials can convert ________ A) Magnetic energy into kinetic energy B) Kinetic energy into magnetic energy C) Both A and B D) None of these
Last answer:
Magnetostrictive materials can convert ________ A) Magnetic energy into kinetic energy B) Kinetic energy into magnetic energy C) Both A and B D) None of these
magnetostrictive
materials
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40
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1
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asked
Mar 25, 2018
by
anonymous
Insulating materials have the function of?
Insulating materials have the function of?
Last answer:
Insulating materials have the function of preventing an open circuit between the voltage source and the load.
insulating
materials
function
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128
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1
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asked
Mar 25, 2018
by
anonymous
Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.
Those materials are well suited for making permanent magnets which have _____ retentivity and _______ coercivity.
Last answer:
Those materials are well suited for making permanent magnets which have high retentivity and high coercivity.
materials
permanent
magnets
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338
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1
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asked
Mar 25, 2018
by
anonymous
Those magnetic materials are best suited for making armature and transformer cores which have...
Those magnetic materials are best suited for making armature and transformer cores which have____permeability and_______hystersis loss.
Last answer:
Those magnetic materials are best suited for making armature and transformer cores which have high permeability and low hystersis loss.
magnetic
materials
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105
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1
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asked
Mar 10, 2018
by
anonymous
Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
Explain the electrical losses of magnetic materials used for the cores of inductors and transformer.
electrical
losses
magnetic
materials
used
cores
inductors
transformer
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68
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0
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asked
Apr 23, 2018
by
anonymous
In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract...
In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing (a) Some dipole misalignment regardless of whether an external field is present (b) Increase in dipole alignment regardless of whether an external field is present (c) No effect on dipole alignment (d) Atoms tend to de -randomize the direction of moments
Last answer:
In ferromagnetic, anti -ferromagnetic and ferrimagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing Some dipole misalignment regardless of whether an external field is present
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asked
Apr 14, 2018
by
anonymous
The dielectric strength of ferromagnetic materials depends to a large extent on
The dielectric strength of ferromagnetic materials depends to a large extent on (a) Intensity of electric field (b) Presence of magnetic materials in vicinity (c) Area of hysterisis loop for materials (d) Frequency of applied voltage
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49
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asked
Apr 14, 2018
by
anonymous
Materials having a high dielectric constant, which is non-linear are known as
Materials having a high dielectric constant, which is non-linear are known as (a) Super dielectrics (b) Elastomers (c) Ferromagnetics (d) Hard dielectrics
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46
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asked
Mar 28, 2018
by
anonymous
Effect of moisture on the insulating materials is to
Last answer:
Effect of moisture on the insulating materials is to decrease dielectric constant, decrease dielectric strength, decrease insulation resistance, increase dielectric loss.
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2.5k
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1
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asked
Mar 28, 2018
by
anonymous
Non-linear resistors?
Last answer:
Non-linear resistors produce harmonic distortion.
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25
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asked
Mar 29, 2018
by
anonymous
The magnetic materials exhibit the property of magnetisation because of
Last answer:
The magnetic materials exhibit the property of magnetisation because of spin of nucleus.
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193
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1
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asked
Mar 29, 2018
by
anonymous
Paramagnetic materials have relative permeability
Last answer:
slightly more than unity
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57
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asked
Mar 29, 2018
by
anonymous
Materials subjected to rapid reversal of magnetism should have
Last answer:
Materials subjected to rapid reversal of magnetism should have high permeability and low hysteresis loss.
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1
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asked
Mar 29, 2018
by
anonymous
The materials having low retentivity are suitable for making
Last answer:
The materials having low retentivity are suitable for making temporary magnets.
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97
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1
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asked
Mar 28, 2018
by
anonymous
Low resistivity materials are used in
Last answer:
Low resistivity materials are used in transformer, motor and generator windings, transmission and distribution lines, house wiring.
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51
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1
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asked
Mar 28, 2018
by
anonymous
Piezoelectric materials serve as a source of _____ .
Piezoelectric materials serve as a source of _____ .
Last answer:
Piezoelectric materials serve as a source of ultrasonic waves.
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80
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1
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asked
Mar 28, 2018
by
anonymous
High resistivity materials are used in?
High resistivity materials are used in?
Last answer:
High resistivity materials are used in precision instruments, heating elements, motor starters, incandescent lamps.
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55
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1
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asked
May 25, 2018
by
anonymous
If a ferromagnetic material is heated upto Curie temperature, it becomes
If a ferromagnetic material is heated upto Curie temperature, it becomes (a) Permanent magnet (b) Anti-ferromagnetic material (c) Diamagnetic material (d) Paramagnetic material
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105
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0
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asked
Apr 25, 2018
by
anonymous
The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in
The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in (a) Heating (b) Small changes in its dimensions (c) Small changes in its crystal structure (d) Some change in its mechanical properties
Last answer:
The phenomenon of magnetostriction occurs when a ferromagnetic substance is magnetized resulting in Small changes in its dimensions
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53
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1
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asked
Apr 23, 2018
by
anonymous
When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is
When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as
Last answer:
When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as Magnetostriction.
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41
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1
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asked
Mar 25, 2018
by
anonymous
The relative permeability of a ferromagnetic material is?
The relative permeability of a ferromagnetic material is?
Last answer:
The relative permeability of a ferromagnetic material is more than 100 or 1000.
relative
permeability
ferromagnetic
material
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75
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1
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asked
Jun 9, 2020
by
anonymous
State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material.
State any two applications of: (i) Ferromagnetic (ii) Paramagnetic material.
Last answer:
Applications of Ferromagnetic Materials: 1. In the transformer laminations. 2. In Electrical machines as a magnetic material. 3. In Magnetic poles of motor and generator 4. Magnetic ... : 1. Solid state MASER 2. Using adiabatic demagnetization low temperature can be achieved.
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26
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1
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asked
Apr 23, 2018
by
anonymous
When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a
When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a
Last answer:
When the temperature of a ferromagnetic material exceeds the Curie temperature, it behaves similar to a Diamagnetic material
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47
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1
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asked
Jan 11
by
anonymous
In Ram nagar Colony, the ratio of school going children to non-school going children is 5 : 4. If in the next year, the number of non-school going children is increased by 20%, making it 35,400 what is the new ratio of school going children to non-school going children? a) 4 : 5 b) 3 : 2 c) 25 : 24 d) 6 : 7 e) None of these
In Ram nagar Colony, the ratio of school going children to non-school going children is 5 : 4. If in the next year, the number of non-school going children is increased by 20%, making it 35,400 what is the new ratio of school going children to non-school going children? a) 4 : 5 b) 3 : 2 c) 25 : 24 d) 6 : 7 e) None of these
Last answer:
Answer: C 5 : 4 → 5 : 4.8 → 25 : 24
ratio-and-proportion
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8
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1
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asked
Aug 3, 2020
by
anonymous
What is Australia’s largest non-salt lake?
What is Australia’s largest non-salt lake?
Last answer:
Lake Mackay, WA
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1
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asked
Aug 2, 2020
by
anonymous
A hollow circular pipe with non-reflective inner surface is cut into 5 pieces and arranged as shown in the figure below. If it is illuminated from below using a torch as shown in the figure, what would be the profile of the light falling on the sheet kept above?
Last answer:
A
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103
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1
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asked
Dec 19, 2018
by
EngMbes
What is the difference between conventional and non-conventional sources of energy
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89
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0
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asked
Dec 19, 2018
by
EngMbes
What is the difference between renewable energy and non-renewable energy sources?
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133
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0
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asked
Mar 10, 2018
by
anonymous
What is a non linear load?
What is a non linear load?
non
linear
load
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47
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0
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asked
2 days
ago
by
anonymous
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ? (1) Radium dating (2) Uranium dating (3) Carbon dating (4) Deuterium dating
What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ? (1) Radium dating (2) Uranium dating (3) Carbon dating (4) Deuterium dating
Last answer:
Carbon dating
chemistry
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20
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1
answer
...