# what is the temperature coefficient of Resistance of semiconductor ?

what is the temperature coefficient of Resistance of semiconductor ?

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

## Related questions

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 : A semiconductor has Negative temperature coefficient of resistance.

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

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

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

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

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.

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 : The electrical conductivity of a semiconductor increases with increase in temperature because (a) the carrier concentration increases (b) the mobility of carrier increases (c) both carrier concentration and mobility increase (d) the band gap decreases

Answer : The electrical conductivity of a semiconductor increases with increase in temperature because the carrier concentration increases

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 : 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 : At absolute zero temperature, an intrinsic semiconductor behaves as (a) a good conductor (b) a super conductor (c) an insulator (d) variable resistor

Description : When the temperature of a doped semiconductor is increased, its conductivity  (1) Decreases (2) Increases (3) Does not change (4) Increases or decreases depending on whether it is p-type or n-type

Answer : When the temperature of a doped semiconductor is increased, its conductivity Increases.

Answer : At absolute temperature, an intrinsic semiconductor has No holes or free electrons.

Answer : At room temperature, an intrinsic semiconductor has A few free electrons and holes.

Answer : When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on Minority carriers.

Answer : At room temperature, the current in an intrinsic semiconductor is due to holes and electrons.

Answer : The conductivity of an extrinsic semiconductor with temperature remains constant.

Answer : As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Decreases.

Answer : When a pure semiconductor is heated, its resistance Goes down.

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 : 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 : What are the number of valence electrons of atoms in semiconductor?

Answer : There are four valence electrons in the atom of a semiconductor.

Answer : The semiconductor of purest form are called intrinsic semiconductor, (eg. Silicon and germinium) where as semiconductor made up by doping of other semiconductor called extrinsic semiconductor.(again extrinsic semiconductor classified as N type n P type semiconductor)

Description : what is semiconductor ?

Answer : For simple understanding is that the semiconductor is a partially conductor and partially insulator which depends on the temperature of conductor.

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

Answer : Super 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

Description : Compared to wire resistance transducers, for temperature measurement, thermistors have advantage of  A) Low value temperature coefficient B) High thermal capacity C) High speed of response D) Large size

Answer : Substances whose specific resistance abruptly decreases at very low temperature are called superconductors.

Description :  ______ has zero temperature co-efficient of resistance.

Answer :  Manganin has zero temperature co-efficient of resistance.

Description : Temperature co-efficient of resistance is expressed in terms of?

Answer : Degree celsius

Description : With rise in temperature the resistance of semi-conductors?

Answer : With rise in temperature the resistance of semi-conductors decreases.

Description : With rise in temperature the resistance of pure metals?

Answer : With rise in temperature the resistance of pure metals increases.

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