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The resistance of insulators __________
- a)Increases with increase in temperature
- b)Decreases with increase in temperature
- c)Remains the same with increase in temperature
- d)Becomes zero with increase in temperature
Correct answer is option 'B'. Can you explain this answer?
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The resistance of insulators __________a)Increases with increase in te...
In case of an insulator, the energy gap between the conduction band and the valence band is very large. When the temperature is increased, the electrons move from the conduction band to the valence band and hence it starts conducting. When conductance increases, resistance decreases, since C=1/R. Thus, when temperature increases, resistance decreases in insulators.
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The resistance of insulators __________a)Increases with increase in te...
Insulators are materials that do not conduct electricity easily. Their resistance is very high, and therefore, they are used to prevent current flow in certain parts of electrical circuits. The resistance of insulators varies with temperature, and this is due to the fact that temperature affects the mobility of electrons in the material. The resistance of insulators increases with temperature, and this is because of the following reasons:
Explanation:
Impact of Temperature on Insulators:
When the temperature of an insulator is increased, the following things happen:
1. Increased Vibrations: The atoms and molecules in the insulator start vibrating more vigorously, and this leads to an increase in collisions between the electrons and the atoms. These collisions impede the flow of electrons, and this leads to an increase in resistance.
2. Increased Energy: The energy of the electrons also increases with temperature, and this leads to an increase in their mobility. However, this increase in mobility is offset by the increase in collisions, and therefore, the resistance of the insulator still increases.
3. Breakdown of Insulator: At very high temperatures, the insulator may break down and start conducting electricity. This is because the energy of the electrons becomes high enough to overcome the energy barriers that prevent them from moving freely.
Conclusion:
In conclusion, the resistance of insulators increases with temperature, and this is due to the increase in collisions between the electrons and atoms, as well as the increase in the energy of the electrons. Insulators are therefore not suitable for use in applications where high temperatures are expected, as they may lead to breakdown and failure of the insulation.
Explanation:
Impact of Temperature on Insulators:
When the temperature of an insulator is increased, the following things happen:
1. Increased Vibrations: The atoms and molecules in the insulator start vibrating more vigorously, and this leads to an increase in collisions between the electrons and the atoms. These collisions impede the flow of electrons, and this leads to an increase in resistance.
2. Increased Energy: The energy of the electrons also increases with temperature, and this leads to an increase in their mobility. However, this increase in mobility is offset by the increase in collisions, and therefore, the resistance of the insulator still increases.
3. Breakdown of Insulator: At very high temperatures, the insulator may break down and start conducting electricity. This is because the energy of the electrons becomes high enough to overcome the energy barriers that prevent them from moving freely.
Conclusion:
In conclusion, the resistance of insulators increases with temperature, and this is due to the increase in collisions between the electrons and atoms, as well as the increase in the energy of the electrons. Insulators are therefore not suitable for use in applications where high temperatures are expected, as they may lead to breakdown and failure of the insulation.
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The resistance of insulators __________a)Increases with increase in te...
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The resistance of insulators __________a)Increases with increase in temperatureb)Decreases with increase in temperaturec)Remains the same with increase in temperatured)Becomes zero with increase in temperatureCorrect answer is option 'B'. Can you explain this answer?
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