Description : What is the permissible flux density in case of cold rolled grained oriented steel?
Answer :
The permissible flux density in case of cold rolled grained oriented steel is 1.7 Wb/m2.
asked
Mar 19, 2018
by
anonymous
Description : Flux density formula
Answer :
Flux density formula
asked
Jun 11, 2019
by
anonymous
Description : Define the following terms: i) Magnetic flux density, ii) Reluctance, iii) Magneto-motive force, iv) Permeance.
Answer :
(i) Magnetic flux density (B): It is the magnetic flux per unit area measured at right angles to the flux path. (Its unit is weber/m2 or tesla). (ii) Reluctance: It is the ... flux to set up through it and it is reciprocal of reluctance. Permeance = 1/ Reluctance. Unit: weber/ampere.
asked
Sep 4, 2018
by
anonymous
Description : Give the relation between magnetic field strength, magnetic flux density and permeability.
asked
Aug 8, 2018
by
anonymous
Description : Define magnetic flux density and state its formula.
Answer :
The magnetic flux per unit area is called as magnetic flux density. Magnetic flux density is denoted by B. The formula for magnetic flux density is Weber per metre square or Tesla. Mathematically ... the unit of magnetic flux density is Weber per metre square which is also called as Tesla.
asked
Aug 8, 2018
by
anonymous
Description : In an induction motor if the flux density is reduced to one-half, of its normal value then the torque will (1) reduce to one-half (2) reduce to one-fourth (3) remain unchanged (4) increase four times
Answer :
In an induction motor if the flux density is reduced.to one-half, of its normal value then the torque will reduce to one-fourth
asked
May 1, 2018
by
anonymous
Answer :
If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.
asked
Mar 20, 2018
by
anonymous
Description : Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
Answer :
Which of the following is a unit of magnetic flux? A) Weber B) Maxwell C) Both A and B D) None of these
asked
Apr 29, 2018
by
anonymous
Description : The unit of magnetic flux is?
Answer :
The unit of magnetic flux is weber.
asked
Mar 25, 2018
by
anonymous
Description : In lead acid battery the density of acid indicates the (1) charge of the battery (2) level of acid (3) e.m.f of the battery (4) damage of the plates
Answer :
In lead acid battery the density of acid indicates the charge of the battery
asked
Apr 30, 2018
by
anonymous
Description : An energy signal has G(f) = 20. Its energy density spectrum is A) 20 B) 100 C) 400 D) 800
Answer :
An energy signal has G(f) = 20. Its energy density spectrum is 400
asked
Jun 18, 2018
by
anonymous
Description : Describe the concept of leakage flux, useful flux and fringing with neat diagram.
Answer :
Leakage Flux
asked
Sep 4, 2018
by
anonymous
Description : Define useful flux, leakage flux and fringing.
asked
Aug 8, 2018
by
anonymous
Description : Explain the leakage flux and its effect with the help of neat diagram.
asked
Aug 8, 2018
by
anonymous
Description : The property of a material which opposes the creation of magnetic flux in it is known as?
Answer :
The property of a material which opposes the creation of magnetic flux in it is known as reluctance.
asked
Mar 25, 2018
by
anonymous
Description : Define the following terms and state their units: (i) Luminous intensity, (ii) Luminous flux
Answer :
i) Luminous intensity: This is defined as the luminous flux emitted into a solid angle of space in a specific direction. Its unit is the candela. OR The luminous flux per unit solid angle ( ... energy radiated by the light source in all direction. The unit of luminous flux is lumen (lm)
asked
Sep 22, 2018
by
anonymous
Description : In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as (1) synchronous motor (2) synchronous generator (3) asynchronous motor (4) asynchronous generator
Answer :
In a synchronous machine, if the field flux axis ahead of the armature field axis in the direction of rotation, the machine is operating as synchronous generator
asked
May 1, 2018
by
anonymous
Description : It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its .......... is held constant.
Answer :
It is possible to increase the field flux and, at the same time, increase the speed of a d.c. motor provided its armature current is held constant.
asked
Mar 26, 2018
by
anonymous
Answer :
Interpole flux should be sufficient to neutralise both the armature reaction flux as well as commutating e.m.f. induced in the coil.
asked
Mar 20, 2018
by
anonymous
Description : The path of magnetic flux in a transformer should have?
Answer :
The path of magnetic flux in a transformer should have low reluctance.
asked
Mar 19, 2018
by
anonymous
Description : What is the smallest unit of a compound with the same chemical characteristics?
Answer :
The molecule is the smallest unit of a compound with the same chemical characteristics.
asked
Jun 29, 2019
by
anonymous
Description : What is the SI unit of conductivity ?
Answer :
The SI unit of conductivity Siemens/m.
asked
Sep 2, 2018
by
anonymous
Description : What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
Answer :
What is the SI unit for magnetic reluctance? A) Ampere B) Ampere-turns per weber C) Henry D) None of these
asked
Apr 29, 2018
by
anonymous
Description : What is the unit of reactance?
Answer :
Unit of reactance is Ohms ( Ω ) .Reactance is denoted by X .
asked
Jan 7, 2018
by
anonymous
Answer :
Unit of power is Watt denoted by capital W .
asked
Sep 20, 2017
by
anonymous
Answer :
Unit of voltage is volt denoted by capital V .
asked
Sep 20, 2017
by
anonymous
Answer :
Unit of resistance is Ohm.
asked
Sep 20, 2017
by
anonymous
Answer :
Unit of work is Joule denoted by capital J .
asked
Sep 20, 2017
by
anonymous
Answer :
Unit of frequency is herzt
asked
Sep 20, 2017
by
anonymous
Answer :
Unit of inductance is Henry denoted by capital H .
asked
Sep 20, 2017
by
anonymous
Description : A) Watt B) Volts C) Farad D) Ampere
Answer :
Correct answer: D) Ampere
asked
Jun 28, 2019
by
anonymous
Description : Options: A) WATT B) AMPERE C) VOLTS D) OHM
Answer :
Correct Answer: A) WATT
asked
Jun 28, 2019
by
anonymous
Description : What does double integration of a unit step function lead to? A) A doublet B) A ramp C) An impulse D) A parabola
Answer :
What does double integration of a unit step function lead to? A) A doublet B) A ramp C) An impulse D) A parabola
asked
Jun 18, 2018
by
anonymous
Description : What is the unit of measure for voltage?
Answer :
Voltage measured in volts.
asked
Mar 10, 2018
by
anonymous
Description : Define resistivity. State its unit.
Answer :
Resistivity can be defined as the resistance of a conducting material per unit length with unit area of cross section. Its unit is ohm/meter
asked
Aug 4, 2019
by
anonymous
Description : Electrical quantities (symbol and basic unit)
Answer :
Electrical quantities (symbol and basic unit)
asked
Jun 29, 2019
by
anonymous
Description : Write the purpose of coal and ash handling unit. Also write different activities that arc carried out in this unit.
Answer :
Purpose of coal and ash handling unit :- To transport coal from coal storage to power plant. A large quantity of ash about 10 to 30 % produced in furnace, the removal of ash from boiler furnace ... disposed off. Various methods of disposal of ash: Mechanical system. Pneumatic system.
asked
Sep 8, 2018
by
anonymous
Description : Define admittance and state its unit.
Answer :
Admittance is defined as the ability of the circuit to carry (admit) alternating current through it. OR It is the reciprocal of impedance Z. i.e Admittance Y = 1/Z. Unit: Its unit is siemen (S) or mho (Ʊ).
Description : Which unit holds data permanently? (A) Input unit (B) Secondary storage unit (C) Output Unit (D) Primary Memory Unit
Answer :
Which unit holds data permanently? (A) Input unit (B) Secondary storage unit (C) Output Unit (D) Primary Memory Unit
asked
May 8, 2018
by
anonymous
Description : The unit heat rate characteristic of a thermal power unit shows : (A) Heat input per kWh of output versus the megawatt output of unit (B) Heat input per kW of output versus the megawatt output of unit (C) Heat input per kWh of output versus the megawatt hour output of unit (D) Heat input per kW of output versus the megawatt hour output of unit
Answer :
The unit heat rate characteristic of a thermal power unit shows : Heat input per kWh of output versus the megawatt output of unit
asked
Apr 30, 2018
by
anonymous
Description : Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens
Answer :
Which of the following is the SI unit for admittance? A) Ohm B) Henry C) Farad D) Siemens
asked
Apr 29, 2018
by
anonymous
Description : Which of the following is an example of SI derived unit? A) Capacitance (Farad) B) Time (second) C) Luminous intensity (Candela) D) All the above
Answer :
Which of the following is an example of SI derived unit? A) Capacitance (Farad) B) Time (second) C) Luminous intensity (Candela) D) All the above
asked
Apr 29, 2018
by
anonymous
Description : The unit of reluctance is?
asked
Mar 25, 2018
by
anonymous
Description : The unit of retentivity is?
Answer :
The unit of retentivity is weber/sq. m.
asked
Mar 25, 2018
by
anonymous
Description : Joule X second is the unit of?
Answer :
Joule X second is the unit of power .
asked
Sep 20, 2017
by
anonymous
Description : Define the following terms related to tariff: (i) Connected load (ii) Unit consumed (iii) Fixed charges (iv) Electricity Tax
Answer :
(i) Connected load It is the sum of the power ratings (Watts or kW or MW) of all devices and machines existing (installed) in the premises of consumer. It is used to decide the ... a percentage of the total electricity bill which includes all amounts that go to the electricity supply agency.
asked
Sep 22, 2018
by
anonymous
Description : Which of the following are components of Central Processing Unit (CPU)? (A) Arithmetic logic unit, Mouse (B) Arithmetic logic unit, Control unit (C) Arithmetic logic unit, Integrated Circuits (D) Control Unit, Monitor
Answer :
Which of the following are components of Central Processing Unit (CPU)? (A) Arithmetic logic unit, Mouse (B) Arithmetic logic unit, Control unit (C) Arithmetic logic unit, Integrated Circuits (D) Control Unit, Monitor
asked
May 8, 2018
by
anonymous
Description : A control system having unit damping factor will give (1) Oscillatory response (2) Undamped response (3) Critically damped response (4) No response
Answer :
1
asked
May 1, 2018
by
anonymous
Description : The unit of speed regulation of a governor is : (A) Hz (B) Hz/MW (C) Hz/MVA (D) rpm/MVAR
Answer :
The unit of speed regulation of a governor is : Hz/MW
asked
Apr 29, 2018
by
anonymous