If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge

If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge
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The answer is 'Decrease'
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If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge

Description : If the temperature of a semiconductor rises, what is its resistivity? -General Knowledge

Last Answer : answer:

If the temperature of a semiconductor rises, what is its resistivity?

Description : If the temperature of a semiconductor rises, what is its resistivity?

Last Answer : – Decrease

If the temperature of a semiconductor rises, what is its resistivity?

Description : If the temperature of a semiconductor rises, what is its resistivity?

Last Answer : Decrease

The temperature (T) dependence of resistivity (rho) of a semiconductor is represented by :

Description : The temperature (T) dependence of resistivity (rho) of a semiconductor is represented by :

Last Answer : The temperature (T) dependence of resistivity (rho) of a semiconductor is represented by : A. B. C. D.

Which of the listed conditions describes the effect on intrinsic semiconductor operation as a result of a temperature increase? A. Additional heat sinks will be required B. Conductivity will increase C. Conductivity will decrease D. Resistivity will increase

Description : Which of the listed conditions describes the effect on intrinsic semiconductor operation as a result of a temperature increase? A. Additional heat sinks will be required B. Conductivity will increase C. Conductivity will decrease D. Resistivity will increase

Last Answer : Answer: B

The resistance of a conductor is inversely proportional to its - (1) temperature (2) resistivity (3) area of cross section (4) length

Description : The resistance of a conductor is inversely proportional to its - (1) temperature (2) resistivity (3) area of cross section (4) length

Last Answer : (3) area of cross section Explanation: The resistance of a current carrying conductor is inversely proportional to the area of cross section of the conductor. This is because the resistance occurs due to the collision of electrons/charged particles.

Find the time of relaxation between collsion and free path of electrons in copper at room temperature. Given resistivity of copper`=1.7xx10^(-8) Omega

Description : Find the time of relaxation between collsion and free path of electrons in copper at room temperature. Given resistivity of copper`=1.7xx10^(-8) Omega

Last Answer : Find the time of relaxation between collsion and free path of electrons in copper at room temperature. Given ... electrons`=1.6xx10^(-4) ms^(-1)`

What is the effect of temperature on earth resistivity?

Description : What is the effect of temperature on earth resistivity?

Last Answer : The temperature co-efficient of resistivity for soil is negative, but it is negligible for temperature above freezing point. Below 0°C the water in the soil begins to freeze and introduces ... the temperature co-efficient, so that as the temperature becomes lower the resistivity rises enormously.  

Coke used for the production of calcium carbide should have (A) Low ash content (B) Low ignition temperature (C) High electrical resistivity (D) All (A), (B) and (C)

Description : Coke used for the production of calcium carbide should have (A) Low ash content (B) Low ignition temperature (C) High electrical resistivity (D) All (A), (B) and (C)

Last Answer : (D) All (A), (B) and (C)

When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

Description : When a sample of germanium and silicon having same impurity density are kept at room temperature then Resistivity of silicon will be higher than that of germanium, Why?

Last Answer : Ans-The answer is simple. Consider the PN diode for Ge 0.3eV is the breakdown voltage and in the case of Si its 0.7eV since the impurities are added in the same amount the bond due to the other atoms of the Si makes it resistive compared to the Ge.. thats all!

Resistivity of conductors is most affected by (A) composition. (B) temperature. (C) pressure. (D) current.

Description : Resistivity of conductors is most affected by (A) composition. (B) temperature. (C) pressure. (D) current.

Last Answer : (B) temperature.

On which of the following variables heat convected depends ? (a) Power density (b) Temperature difference between heated surface and coolant (c) Thermal resistivity, density, specific heat (d) Gravitational constant (e) All ofthe above

Description : On which of the following variables heat convected depends ? (a) Power density (b) Temperature difference between heated surface and coolant (c) Thermal resistivity, density, specific heat (d) Gravitational constant (e) All ofthe above

Last Answer : (e) All ofthe above

The resistivity of a metal is a function of temperature because

Last Answer : The resistivity of a metal is a function of temperature because the amplitude of vibration of the atoms varies with temperature.

How much heat is absorbed by a 59g iron skillet when its temperature rises from 10oC to 25oC?

Description : How much heat is absorbed by a 59g iron skillet when its temperature rises from 10oC to 25oC?

Last Answer : 410 JFirst you need to find the specific heat capacity (c) for iron, which is 0.461 J/g-oC (https://www.engineersedge.com/materials/specific_heat_capacity_of_metals_13259.htm).The equation to use is Q=m x c x delta t, ... Q = 59 g x 0.461 J/g-oC x 15 oC = 410 J (rounded to two significant figures)

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Description : As the temperature of ice rises, the ice melts and its density _____. A. Decreases B. Remains constant C. Increases D. Increases upto 10 °C

Last Answer : ANSWER: C

As the temperature of ice rises, the ice melts and its density? A. Decreases B. Remain constant C. Increases (Answer) D. Increases upto 10C

Description : As the temperature of ice rises, the ice melts and its density? A. Decreases B. Remain constant C. Increases (Answer) D. Increases upto 10C

Last Answer : C. Increases (Answer)

Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by NOx emission is much higher by four stroke petrol engines as compared to the two stroke engines (C) Temperature in stratosphere rises with increasing altitude (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

Description : Pick out the wrong statement. (A) Biological oxygen demand (B.O.D.) value of a sewerage sample is always lower than its chemical oxygen demand (C.O.D.) value (B) Environmental pollution by ... in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

Last Answer : (D) The characteristic of a green house body is that it allows the long wavelength incoming solar radiation to come in but does not allow the short wavelength infra red radiation to escape out of the earth's atmosphere

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

Description : 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.

If temperature rises, what will be the coefficient of viscosity of liquid? -Do You Know?

Description : If temperature rises, what will be the coefficient of viscosity of liquid? -Do You Know?

Last Answer : As temperature increases, coefficient of viscosity decreases.

Which statement regarding air temperature is NOT trueCool air rises and warm air falls.Air heats up more quickly than land.Warm air is less dense than cool air.Air heats up more quickly than water?

Description : Which statement regarding air temperature is NOT trueCool air rises and warm air falls.Air heats up more quickly than land.Warm air is less dense than cool air.Air heats up more quickly than water?

Last Answer : Cool air rises and warm air falls is false. Cool air is denser than warm air, and therefore warm air will rise above cold air.

Why does the temperature drop as it rises above the earth's surface ?

Description : Why does the temperature drop as it rises above the earth's surface ?

Last Answer : This is because the air density is lower in the upper part of the earth and the amount of dust in the air is less. As a result, the sun's rays are less scattered in the dust above ... is 190K . The Van Allen Belt then began to raise the temperature for sunlight and other cosmic radiation.

What happens when a objects temperature rises?

Description : What happens when a objects temperature rises?

Last Answer : The molecules which make up the objects move morevigorously.

When the body temperature rises a center in the brain initiates physiological changes decrease the body temperature. this is an example of?

Description : When the body temperature rises a center in the brain initiates physiological changes decrease the body temperature. this is an example of?

Last Answer : What is the answer ?

In an oil lamp, the oil rises up in the wick due to _____? A. Capillary action B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Description : In an oil lamp, the oil rises up in the wick due to _____? A. Capillary action B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Last Answer : ANSWER: A

Routine A.C. motor maintenance should include periodic ______________. A. thermometer readings at normal loads to detect abnormal temperature rises B. inspection of the motor's internals for loose rotor bars or field poles C. bearing replacement each year using sealed units if available D. all of the above

Description : Routine A.C. motor maintenance should include periodic ______________. A. thermometer readings at normal loads to detect abnormal temperature rises B. inspection of the motor's internals for loose rotor bars ... C. bearing replacement each year using sealed units if available D. all of the above

Last Answer : Answer: A

If temperature rises, what will be the coefficient of viscosity of liquid?

Description : If temperature rises, what will be the coefficient of viscosity of liquid?

Last Answer : Decreases

When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity. (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Description : When the __________ the relative humidity of air decreases, despite an increase in the absolute humidity. (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Last Answer : (A) Temperature rises

The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Description : The relative humidity of air decreases in-spite of an increase in the absolute humidity, when the (A) Temperature rises (B) Pressure rises (C) Temperature falls (D) Pressure falls

Last Answer : (A) Temperature rises

In an oil lamp, the oil rises up in the wick due to? A. Capillary action (Answer) B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Description : In an oil lamp, the oil rises up in the wick due to? A. Capillary action (Answer) B. Atmospheric pressure C. Viscosity of oil D. Change in temperature

Last Answer : A. Capillary action (Answer)

When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity

Description : When temperature rises, resistance of negative temperature coefficient thermistor A. increases B. decreases C. zero D. infinity

Last Answer : decreases

The lift of a balloon is (A) Increased, as it rises to a higher altitude (B) Due to the weight of the atmospheric air, that it displaces (C) Not dependent on the temperature of the atmosphere (D) None of these

Description : The lift of a balloon is (A) Increased, as it rises to a higher altitude (B) Due to the weight of the atmospheric air, that it displaces (C) Not dependent on the temperature of the atmosphere (D) None of these

Last Answer : (B) Due to the weight of the atmospheric air, that it displaces

With increase in temperature, the equilibrium __________ rises in case of endothermic reaction. (A) Constant (B) Conversion (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : With increase in temperature, the equilibrium __________ rises in case of endothermic reaction. (A) Constant (B) Conversion (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (B) Conversion

The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises from 10 to 100°C. (A) 256 (B) 512 (C) 112 (D) 612

Description : The rate of a chemical reaction is almost doubled for every 10°C rise in temperature. The rate will increase __________ times, if the temperature rises from 10 to 100°C. (A) 256 (B) 512 (C) 112 (D) 612

Last Answer : (B) 512

A 1-kg steam-water mixture at 1.0 MPa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPa and the temperature to 400°. Determine the heat added.  a) 1378.7 kJ  b) 1348.5 kJ  c) 1278,7 kJ  d) 1246,5 kJ Formula: Q = (h2 – p2v2) –(h1 –p1v1)

Description : A 1-kg steam-water mixture at 1.0 MPa is contained in an inflexible tank. Heat is added until the pressure rises to 3.5 MPa and the temperature to 400°. Determine the heat added.  a) 1378.7 kJ  b) 1348.5 kJ  c) 1278,7 kJ  d) 1246,5 kJ Formula: Q = (h2 – p2v2) –(h1 –p1v1)

Last Answer : 1378.7 kJ

On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises?  a. the relative humidity increases  b. the relative humidity decreases  c. the relative humidity remains constant  d. the air would eventually become saturated

Description : On a day when the partial pressure of water vapor remains constant, what happens as the temperature rises?  a. the relative humidity increases  b. the relative humidity decreases  c. the relative humidity remains constant  d. the air would eventually become saturated

Last Answer : the relative humidity decreases

What happens to resistance of conductors when temperature rises?

Description : What happens to resistance of conductors when temperature rises?

Last Answer : For conductors an increase in temperature will cause their resistance to increase.

What happens to insulation when temperature rises?

Description : What happens to insulation when temperature rises?

Last Answer : For insulators, an increase in temperature will cause their resistance to decrease -which is why excessive temperature is often the main reason why insulation fails

Ten calories of heat are added to 2 grams of water. The temperature of the water rises to a total of how many degrees? Is it: w) 2 degrees Celsius x) 5 degrees Celsius y) 10 degrees Celsius z) 20 degrees Celsius

Description : Ten calories of heat are added to 2 grams of water. The temperature of the water rises to a total of how many degrees? Is it: w) 2 degrees Celsius x) 5 degrees Celsius y) 10 degrees Celsius z) 20 degrees Celsius

Last Answer : ANSWER: X -- 5 DEGREES CELSIUS

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

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

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

What is the effect of temperature on an intrinsic semiconductor?

Description : What is the effect of temperature on an intrinsic semiconductor?

Last Answer : An intrinsic semiconductor is basically a pure semiconductor, though some might argue that a small amount of doping can still yield an intrinsic semiconductor. In the crystal structure of ... semiconductor has a positive temperature coefficient. More heat, more conduction under the same conditions.

If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a: (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects

If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Description : If electrical conductivity increases with the increase of temperature of a substance, then it is a (1) Conductor (2) Semiconductor (3) Insulator (4) Carborator

Last Answer : (2) Semiconductor Explanation: A solid substance that has conductivity between that of an insulator and that of most metals, either due to the addition of an impurity or because of temperature effects.

A semiconductor that decreases in resistance with an increase in temperature is known as a _____________. A. resistor B. thermistor C. diode D. thermopile

Description : A semiconductor that decreases in resistance with an increase in temperature is known as a _____________. A. resistor B. thermistor C. diode D. thermopile

Last Answer : Answer: B

Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by sharing of electrons is present in all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Description : Pick out the wrong statement. (A) Copper is the metal having the highest electronic conductivity (B) Hardenability & Weldability of metals are inversely related (C) Covalent bonding formed by ... all semiconductor materials (D) Glass transition temperature applies to 'polymers' but not to 'glasses'

Last Answer : Option A

The conductivity of an extrinsic semiconductor (A) decreases with temperature. (B) increases with temperature. (C) remains constant with temperature. (D) decreases and then increases with temperature.

Description : The conductivity of an extrinsic semiconductor (A) decreases with temperature. (B) increases with temperature. (C) remains constant with temperature. (D) decreases and then increases with temperature.

Last Answer : (B) increases with temperature.

C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C lie in the third orbit, whereas for Si they lie in the fourth orbit (2) In case of C the valance band is not completely filled at absolute zero temperature (3) In case of C the conduction band is partly filled even at absolute zero temperature (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Description : C and Si both have same lattice structure, having 4 bonding electrons in each. However, C is insulator where as Si is intrinsic semiconductor. This is because (1) The four bonding electrons in the case of C ... the case of C lie in the second orbit, whereas in the case of Si they lie in the third

Last Answer : (4) The four bonding electrons in the case of C lie in the second orbit, whereas in the case of Si they lie in the third

The electrical conductivity of a semiconductor increases with increase in temperature because

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

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

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

Description : 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