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what is the temperature coefficient of Resistance of conductor ?
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Aug 14, 2017
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anonymous
what is the temperature coefficient of Resistance of conductor ?
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Sep 30, 2017
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anonymous
conductors have positive coefficient. means as the temperature increases resistance also increases.
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Aug 14, 2017
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anonymous
what is the temperature coefficient of Resistance of semiconductor ?
what is the temperature coefficient of Resistance of semiconductor ?
Last answer:
semiconductors have negative temperature coefficient of resistance. means as the temperature increases resistance decreases.
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Mar 31, 2018
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anonymous
A metal resistor has resistance of 10 ohm at 0°C and 11 ohms at 160°C, the temperature coefficient is
Last answer:
A metal resistor has resistance of 10 ohm at 0°C and 11 ohms at 160°C, the temperature coefficient is 0.000625 /°C.
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3 days
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When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion
When hot liquid is poured into a thick glass tumbler, it cracks because glass : (1) is a bad conductor of heat so only inner surface expands (2) has high temperature coefficient of expansion (3) has a very low specific heat (4) has low temperature coefficient of expansion
Last answer:
is a bad conductor of heat so only inner surface expands
physics
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Apr 23, 2018
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anonymous
A semiconductor device made out of a material having very high temperature coefficient of resistance is
A semiconductor device made out of a material having very high temperature coefficient of resistance is
Last answer:
A semiconductor device made out of a material having very high temperature coefficient of resistance is Thermistor
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Mar 31, 2018
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anonymous
The resistance temperature coefficient is defined as
Last answer:
The resistance temperature coefficient is defined as the ratio of increase in resistance per degree centigrade to the resistance at 0oC.
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May 20, 2019
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Problem on temperature coefficient of resistance 3
Problem on temperature coefficient of resistance 3
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Problem on temperature coefficient of resistance 3
problem
on
temperature
coefficient
of
resistance
3
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May 20, 2019
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Problem on temperature coefficient of resistance 2
Problem on temperature coefficient of resistance 2
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Problem on temperature coefficient of resistance 2
problem
on
temperature
coefficient
of
resistance
2
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May 19, 2019
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anonymous
Problem on temperature coefficient of resistance 1
Problem on temperature coefficient of resistance 1
Last answer:
Problem on temperature coefficient of resistance 1
problem
on
temperature
coefficient
of
resistance
1
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Mar 28, 2018
by
anonymous
The metal having the lowest temperature coefficient of resistance is
The metal having the lowest temperature coefficient of resistance is
Last answer:
The metal having the lowest temperature coefficient of resistance is gold.
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Apr 10, 2018
by
anonymous
Which amongst the following has a negative coefficient of temperature for resistance?
Which amongst the following has a negative coefficient of temperature for resistance? a) Copper b) Lead c) Carbon d) Aluminium
Last answer:
Which amongst the following has a negative coefficient of temperature for resistance? Carbon
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Mar 29, 2018
by
anonymous
A semiconductor has ………… temperature coefficient of resistance.
Last answer:
A semiconductor has Negative temperature coefficient of resistance.
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asked
Apr 9, 2018
by
anonymous
What device is similar to an RTD but has a negative temperature coefficient?
What device is similar to an RTD but has a negative temperature coefficient? A) Strain gauge B) Thermistor C) Negative-type RTD D) Thermocouple
Last answer:
What device is similar to an RTD but has a negative temperature coefficients
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Apr 9, 2018
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anonymous
What type of temperature coefficient do thermistors have?
What type of temperature coefficient do thermistors have? (1) Positive (2) Negative (3) Either positive or negative (4) None of these
Last answer:
Either positive or negative type of temperature coefficient do thermistors have.
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Sep 9, 2018
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anonymous
Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.
Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.
Last answer:
Parameters RTD Thermistors Temperature coefficient It has positive temperature Coefficient (PTC) of Resistance. It has both positive and negative temperature Coefficient (PTC and NTC) of Resistance. ... -270oC to 2800oC -150oC to 300oC Cost High cost Low cost
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Apr 29, 2018
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anonymous
Which of the following has nearly zero temperature coefficient?
Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these
Last answer:
Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these
zero
temperature
coefficient
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Apr 12, 2018
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anonymous
Which of the following has negative temperature coefficient?
Which of the following has negative temperature coefficient? A. Brass B. Mercury C. Electrolytes D. Silver.
Last answer:
Electrolytes has negative temperature coefficient.
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Mar 29, 2018
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anonymous
Whenever a wave is incident on a perfect conductor then the reflection coefficient is
Last answer:
Whenever a wave is incident on a perfect conductor then the reflection coefficient is 0.
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Jun 29, 2019
by
anonymous
How does the resistance of a conductor compare to that of an insulator?
How does the resistance of a conductor compare to that of an insulator?
Last answer:
The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.
how
does
the
resistance
of
a
conductor
compare
to
that
an
insulator
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Sep 4, 2018
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anonymous
Write the four factors affecting the resistance of a conductor.
Write the four factors affecting the resistance of a conductor.
Last answer:
Factors affecting the resistance of a conductor: - 1.Physical state of a conductor 2.Length of a conductor 3.Area of cross section of a conductor 4.Resistivity of a conductor
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Apr 11, 2018
by
anonymous
The effective resistance of a conductor will be the same as ohmic resistance when : -
The effective resistance of a conductor will be the same as ohmic resistance when : - a) current is in true sine wave form b) voltage is low c) power factor is unity d) current is uniformly distributed in the conductor cross-section
Last answer:
The effective resistance of a conductor will be the same as ohmic resistance when : - current is uniformly distributed in the conductor cross-section
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Apr 9, 2018
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anonymous
With the increase in the cross sectional area of the conductor, the value of resistance:
With the increase in the cross sectional area of the conductor, the value of resistance: (1) Increase (2) Remain same (3) Decrease (4) None of these
Last answer:
With the increase in the cross sectional area of the conductor, the value of resistance: Decrease.
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3 days
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anonymous
Pressure Cooker cooks faster because (1) boiling point decreases with rise of pressure (2) it cooks the food at low pressure (3) higher temperature is attained for cooking (4) the material of the cooker is a good conductor
Pressure Cooker cooks faster because (1) boiling point decreases with rise of pressure (2) it cooks the food at low pressure (3) higher temperature is attained for cooking (4) the material of the cooker is a good conductor
Last answer:
higher temperature is attained for cooking
physics
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5 days
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anonymous
Wollen clothes keep the body warm because (1) Wool increases the temperature of the body (2) Wool is a bad conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects
Wollen clothes keep the body warm because (1) Wool increases the temperature of the body (2) Wool is a bad conductor (3) Wool absorbs radiant heat from outer objects (4) Wool rejects heat from the outer objects
Last answer:
Wool is a bad conductor
physics
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Aug 14, 2017
by
anonymous
resistance of conductor depends on?
resistance of conductor depends on?
Last answer:
Use of material Temperature of surrounding Length of conductor Area of cross section of conductor
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Jun 18, 2018
by
anonymous
A resistor in which the resistance changes exponentially with change in temperature is called as
A resistor in which the resistance changes exponentially with change in temperature is called as A) Potentiometer B) Phototransistor C) Varactor D) Thermistor
Last answer:
A resistor in which the resistance changes exponentially with change in temperature is called as Thermistor
resistor
resistance
exponentially
change
temperature
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Aug 14, 2017
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anonymous
how the temperature is related to resistance ?
how the temperature is related to resistance ?
Last answer:
in case of conductors temperature is directly proportional to resistance means if the temperature increases resistance also increases.
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Mar 25, 2018
by
anonymous
When electric current passes through a metallic conductor, its temperature rises. This is due to?
When electric current passes through a metallic conductor, its temperature rises. This is due to?
Last answer:
When electric current passes through a metallic conductor, its temperature rises. This is due to collisions between conduction electrons and atoms.
electric
current
metallic
conductor
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Jun 18, 2018
by
anonymous
A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient?
A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9
Last answer:
A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9
transmission
line
terminated
impedance
reflection
coefficient
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asked
Apr 9, 2018
by
anonymous
With the increase in the temperature the resistance of copper:
With the increase in the temperature the resistance of copper: _____ and explain why? (1) Increase (3) Remain constant (2) Become zero (4) Decreases.
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Sep 4, 2018
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anonymous
What is coefficient of coupling? Explain in brief.
What is coefficient of coupling? Explain in brief.
Last answer:
Coefficient of coupling (k): It is defined as the ratio of actual mutual inductance present between two coils to the maximum possible value. If L1 and L2 are coefficients of self ... K is less than one. The coefficient of coupling is also called as Magnetic coupling Coefficient.
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Mar 31, 2018
by
anonymous
Two materials have resistance temperature coefficients of 0.004 and ...
Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In what ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002?
Last answer:
Two materials have resistance temperature coefficients of 0.004 and 0.0002 respectively at a given temperature. In 9:10 ratio should the wires made of these materials be connected in series so as to have an overall temperature coefficient of 0.002.
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3 days
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anonymous
At low temperature, Lead behaves as a : (1) Semi conductor (2) Super conductor (3) Insulator (4) Conductor
At low temperature, Lead behaves as a : (1) Semi conductor (2) Super conductor (3) Insulator (4) Conductor
Last answer:
Super conductor
physics
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3 days
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anonymous
Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator
Solids which conduct electricity at higher temperature but not at lower temperature are called (1) super-conductor (2) metallic-conductor (3) semi-conductor (4) insulator
Last answer:
semi-conductor
physics
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May 25, 2018
by
anonymous
The d.c. resistance of a conductor due to skin effect is
The d.c. resistance of a conductor due to skin effect is (a) unchanged (b) decreased (c) increased (d) infinite
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May 15, 2018
by
anonymous
If the diameter of a conductor of 10 ohms is doubled, its new resistance would be?
If the diameter of a conductor of 10 ohms is doubled, its new resistance would be? A.20 ohms B.5 ohms C.40 ohms D.2.5 ohms
Last answer:
4
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2
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asked
Apr 9, 2018
by
anonymous
How does the resistance of a circular conductor behave, if the diameter of the conductor is halved?
How does the resistance of a circular conductor behave, if the diameter of the conductor is halved? A) Remains unchanged B) Doubles C) Becomes 4 times D) Becomes one -fourth
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Mar 28, 2018
by
anonymous
If the resistance of a conductor does not vary in accordance with Ohm's law it is known as
Last answer:
If the resistance of a conductor does not vary in accordance with Ohm's law it is known as non-linear conductor
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Mar 25, 2018
by
anonymous
The resistance of a few meters of wire conductor in closed electrical circuit is?
The resistance of a few meters of wire conductor in closed electrical circuit is?
Last answer:
The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.
resistance
meters
wire
conductor
electrical
circuit
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Mar 25, 2018
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anonymous
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?
Last answer:
If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.
wire
conductor
ohm
resistance
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Mar 28, 2018
by
anonymous
The resistance of a conductor will be least
Last answer:
The resistance of a conductor will be least For dc.
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Mar 25, 2018
by
anonymous
The resistance of a conductor varies inversely as?
The resistance of a conductor varies inversely as?
Last answer:
The resistance of a conductor varies inversely as area of cross-section.
resistance
conductor
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asked
3 days
ago
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anonymous
Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature
Indicate the false statement about the resistance of a wire (1) it depends on material of wire (2) it is directly proportional to the length of wire (3) it is directly proportional to the area of cross-section of wire (4) resistance of metallic wire increases with increase in temperature
Last answer:
it is directly proportional to the area of cross-section of wire
physics
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Apr 25, 2018
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anonymous
The transducer with negative temperature co-efficient of resistance is
The transducer with negative temperature co-efficient of resistance is (A) Thermistor (B) Resistance Thermometer (C) Strain Gauge (D) Thermocouple
Last answer:
The transducer with negative temperature co-efficient of resistance is Thermistor
transducer
negative
temperature
co-efficient
resistance
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Mar 25, 2018
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anonymous
Temperature co-efficient of resistance is expressed in terms of?
Temperature co-efficient of resistance is expressed in terms of?
Last answer:
Degree celsius
temperature
resistance
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3 days
ago
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anonymous
Super conductors are substances that (1) offer minimum resistance to flow of electric current (2) conduct electricity at low temperature (3) conduct electricity at high temperature (4) offer high resistance to the flow of electric current
Super conductors are substances that (1) offer minimum resistance to flow of electric current (2) conduct electricity at low temperature (3) conduct electricity at high temperature (4) offer high resistance to the flow of electric current
Last answer:
offer minimum resistance to flow of electric current
physics
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3 days
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anonymous
For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum
For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum
Last answer:
Nichrome
physics
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Apr 11, 2018
by
anonymous
The temperature of resistance furnaces can be controlled by changing the:
The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) all of the above
Last answer:
The temperature of resistance furnaces can be controlled by changing the: (A) applied voltage (B) number of heating elements (C) circuit configuration (D) all of the above
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asked
Mar 25, 2018
by
anonymous
With rise in temperature the resistance of semi-conductors?
With rise in temperature the resistance of semi-conductors?
Last answer:
With rise in temperature the resistance of semi-conductors decreases.
rise
temperature
resistance
semiconductors
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asked
Mar 25, 2018
by
anonymous
With rise in temperature the resistance of pure metals?
With rise in temperature the resistance of pure metals?
Last answer:
With rise in temperature the resistance of pure metals increases.
temperature
resistance
metals
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Apr 25, 2018
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anonymous
If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge...
If a positively charged body is placed inside a spherical hollow conductor, what will be the polarity of charge inside and outside the hollow conductor ? (a) Inside positive, outside negative (b) Inside negative, outside positive (c) Both negative (d) Both positive
Last answer:
The polarity of the charge will positive
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...