Rankers Physics

Properties of Semiconductors: Practice Problem & Solution

The solids which have the negative temperature coefficient of resistance are: (2020)
Insulators only
Semiconductors only
Insulators and semiconductors
Metals

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Properties of Semiconductors. Understanding the underlying formula is key to arriving at the correct answer below:

For both insulators and semiconductors, the number density of charge carriers increases exponentially with temperature. This causes their resistance to decrease, meaning they have a negative temperature coefficient of resistance.

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Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. Assertion (A): The temperature coefficient of resistance is positive for metals and negative for semiconductors. Reason (R): On raising the temperature, in metals drift velocity increases but in semiconductors more charge carriers are released.  
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