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Why does resistance of a metallic …

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Why does resistance of a metallic conductor increases with increase in temperature
  • 2 answers

Yogita Ingle 5 years, 1 month ago

When a metallic conductor is heated, the atoms in the metal vibrate with greater amplitude and frequency. Due to increase in temperature, the thermal velocities of free electrons also increases. Therefore, the number of collisions between free electrons and atoms increases. This increases the opposition to the movement of electrons and hence the resistance of the conductor.

Sanjini Kumari 5 years, 1 month ago

because if resistance is increasing so flow of electrons also increase and with this the friction between two electrons take place and heat generate.
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