Assertion: If the temperature of a semiconductor is increased then its resistance decreases. Reason: The energy gap between conduction band and valence band is very small
Answers
Answer:
Assertion is true, Reason is true; Reason is a correct explanation.
Explanation:
Step 1: The energy difference between the conduction band and valence band in semiconductors is negligibly tiny ( eV). An electron in the valence band gains thermal energy as the temperature rises, giving it the potential to leap across the small energy gap (to the conduction band). As a result, resistance diminishes as conductivity rises.
Conduction band and valence band energy gaps in semiconductors are relatively tiny ( eV). The valence band electron in a rising temperature gains thermal energy and may leap across the small energy gap (to the conduction band). Thus, as conductivity rises, resistance declines.
Step 2: When the temperature rises in semiconductors, the electrons in the valence band become excited and leap into the conduction band, increasing the conductance and decreasing resistance. Resistivity also diminishes because resistance and resistivity are inversely proportional.
Assertion is true, Reason is true; Reason is a correct explanation.
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Answer:
Both Assertion and Reason are true, and Reason is a correct explanation.
Explanation:
Explanation:Step 1: The energy difference between the conduction band and valence band in semiconductors is negligibly tiny ( eV). An electron in the valence band gains thermal energy as the temperature rises, giving it the potential to leap across the small energy gap (to the conduction band). As a result, resistance diminishes as conductivity rises.Conduction band and valence band energy gaps in semiconductors are relatively tiny ( eV). The valence band electron in a rising temperature gains thermal energy and may leap across the small energy gap (to the conduction band). Thus, as conductivity rises, resistance declines.
Step 2: When the temperature rises in semiconductors, the electrons in the valence band become excited and leap into the conduction band, increasing the conductance and decreasing resistance. Resistivity also diminishes because resistance and resistivity are inversely proportional.
Learn more about similar questions visit
https://brainly.in/question/16170593
https://brainly.in/question/27936901
#SPJ4