# what is the temperature coefficient of Resistance of conductor ?

what is the temperature coefficient of Resistance of conductor ?

conductors have positive coefficient. means as the temperature increases resistance also increases.

## Related questions

Description : what is the temperature coefficient of Resistance of semiconductor ?

Answer : semiconductors have negative temperature coefficient of resistance. means as the temperature increases resistance decreases.

Description : 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

Answer :  is a bad conductor of heat so only inner surface expands

Description : Problem on temperature coefficient of resistance 3

Answer : Problem on temperature coefficient of resistance 3

Description : Problem on temperature coefficient of resistance 2

Answer : Problem on temperature coefficient of resistance 2

Description : Problem on temperature coefficient of resistance 1

Answer : Problem on temperature coefficient of resistance 1

Description : A semiconductor device made out of a material having very high temperature coefficient of resistance is

Answer : A semiconductor device made out of a material having very high temperature coefficient of resistance is Thermistor

Answer : The resistance temperature coefficient is defined as the ratio of increase in resistance per degree centigrade to the resistance at 0oC.

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.

Description : Which amongst the following has a negative coefficient of temperature for resistance?  a) Copper b) Lead c) Carbon d) Aluminium

Answer : Which amongst the following has a negative coefficient of temperature for resistance? Carbon

Answer : A semiconductor has Negative temperature coefficient of resistance.

Description :  The metal having the lowest temperature coefficient of resistance is

Answer : The metal having the lowest temperature coefficient of resistance is gold.

Description : Compare RTD and thermistor on the basis of temperature coefficient , linearity, temperature range and cost.

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

Description : Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these

Answer : Which of the following has nearly zero temperature coefficient? A) Constantan B) Manganin C) Both A and B D) None of these

Description : Which of the following has negative temperature coefficient? A. Brass B. Mercury C. Electrolytes D. Silver.

Answer : Electrolytes has negative temperature coefficient.

Answer : Whenever a wave is incident on a perfect conductor then the reflection coefficient is 0.

Description : What type of temperature coefficient do thermistors have?  (1) Positive (2) Negative (3) Either positive or negative (4) None of these

Answer : Either positive or negative type of temperature coefficient do thermistors have.

Description : What device is similar to an RTD but has a negative temperature coefficient?  A) Strain gauge B) Thermistor C) Negative-type RTD D) Thermocouple

Answer : What device is similar to an RTD but has a negative temperature coefficients

Description : How does the resistance of a conductor compare to that of an insulator?

Answer : The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.

Description : Write the four factors affecting the resistance of a conductor.

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

Description : 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

Answer : The effective resistance of a conductor will be the same as ohmic resistance when : - current is uniformly distributed in the conductor cross-section

Description : 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

Answer : With the increase in the cross sectional area of the conductor, the value of resistance: Decrease.

Description : resistance of conductor depends on?

Answer : Use of material Temperature of surrounding Length of conductor Area of cross section of conductor

Description : Ice skating is possible and practical because of a unique property of water. Is it because: w) The coefficient of kinetic friction of steel on frozen water decreases with decreasing temperature x ... sublimes y) The melting point decreases with increasing pressure z) Ice is a good thermal insulator

Answer : ANSWER: Y -- THE MELTING POINT DECREASES WITH INCREASING PRESSURE

Description : At low temperature, Lead behaves as a : (1) Semi conductor (2) Super conductor (3) Insulator (4) Conductor

Description : 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

Description : 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

Answer : higher temperature is attained for cooking

Description : 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

Description : When electric current passes through a metallic conductor, its temperature rises. This is due to?

Answer : When electric current passes through a metallic conductor, its temperature rises. This is due to collisions between conduction electrons and atoms.

Description :  A resistor in which the resistance changes exponentially with change in temperature is called as A) Potentiometer B) Phototransistor C) Varactor D) Thermistor

Answer :  A resistor in which the resistance changes exponentially with change in temperature is called as Thermistor

Description : With the increase in the temperature the resistance of copper: _____ and explain why? (1) Increase (3) Remain constant (2) Become zero (4) Decreases.

Description : 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?

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.

Description : how the temperature is related to resistance ?

Answer : in case of conductors temperature is directly proportional to resistance means if the temperature increases resistance also increases.

Description : The d.c. resistance of a conductor due to skin effect is (a) unchanged (b) decreased (c) increased (d) infinite

Description : 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

Description : 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

Answer : The resistance of a conductor will be least For dc.

Answer : If the resistance of a conductor does not vary in accordance with Ohm's law it is known as non-linear conductor

Description : If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes?

Answer : If a wire conductor of 0.2 ohm resistance is doubled in length, its resistance becomes 0.4 ohm.

Description : The resistance of a few meters of wire conductor in closed electrical circuit is?

Answer : The resistance of a few meters of wire conductor in closed electrical circuit is practically zero.

Description : The resistance of a conductor varies inversely as?

Answer : The resistance of a conductor varies inversely as area of cross-section.

Description : What is coefficient of coupling? Explain in brief.

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.

Description : 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

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

Description : Describe construction and working of Resistance Temperature Detector (RTD).

Answer : RTD:  Construction and working: Resistance thermometer bulbs consist of a coil of fine wire wound or in a frame of insulating material. The resistance wire itself must be homogeneous in order to ... surrounding it. Thus RTD is used to measure temperature in terms of change in resistance.

Description : 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

Answer : offer minimum resistance to flow of electric current

Description : Certain substances loose their electrical resistance completely at super low temperature. Such substances are called. (1) Super conductors (2) Semi conductors (3) Dielectrics (4) Perfect conductors

Description : 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

Answer :  it is directly proportional to the area of cross-section of wire

Description : For which of the following substances, the resistance decreases with increase in temperature? (1) Pure silicon (2) Copper (3) Nichrome (4) Platinum

Description : Effect of Temperature on Resistance

Answer : Effect of Temperature on Resistance

Description : The transducer with negative temperature co-efficient of resistance is (A) Thermistor (B) Resistance Thermometer (C) Strain Gauge (D) Thermocouple

Answer : The transducer with negative temperature co-efficient of resistance is Thermistor

Description : 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

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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