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  4. Which of the following quantities do not change when a resistor connected to a battery is heated due to the current?

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Q. Which of the following quantities do not change when a resistor connected to a battery is heated due to the current?

BITSATBITSAT 2010

Solution:

Resistance, resistivity and drift velocity varies with relaxation time which is dependent on temperature. Number of free electrons in a conductor remains invariant even if its temperature changes.