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NEET2022PhysicsCurrent ElectricityActual

As the temperature increases, the electrical resistance

Options

  1. Adecreases for both conductors and semiconductors
  2. Bincreases for conductors but decreases for semiconductors
  3. Cdecreases for conductors but increases for semiconductors
  4. Dincreases for both conductors and semiconductors

Correct answer

B. increases for conductors but decreases for semiconductors

Step-by-step solution

For conductors, on increasing temperature, thermal agitation of free electrons increases. Hence, resistance increases. For Semiconductors, number of holes or charge carriers increases with increase in temperature. Hence, resistance increases for conductors but decreases for semiconductors. ⇒ Answer is (b)

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