What happens to the resistance of a semiconductor as temperature increases? (202

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Question: What happens to the resistance of a semiconductor as temperature increases? (2021)

Options:

Correct Answer: Decreases

Exam Year: 2021

Solution:

The resistance of a semiconductor decreases with an increase in temperature due to the increased number of charge carriers.

What happens to the resistance of a semiconductor as temperature increases? (2021)

What happens to the resistance of a semiconductor as temperature increases? (2021)

Step 1: Understand what a semiconductor is. A semiconductor is a material that can conduct electricity under certain conditions, like silicon.
Step 2: Know that resistance is a measure of how much a material opposes the flow of electric current.
Step 3: Learn that temperature affects the behavior of semiconductors. As temperature increases, the energy of the atoms in the semiconductor also increases.
Step 4: Realize that higher energy means more electrons can move freely. This creates more charge carriers (electrons) that can carry electric current.
Step 5: Since there are more charge carriers available to conduct electricity, the resistance of the semiconductor decreases.
Step 6: Conclude that as temperature goes up, the resistance of a semiconductor goes down.

Temperature Dependence of Resistance – As temperature increases, the thermal energy allows more charge carriers to be excited into the conduction band, leading to decreased resistance.