Q113 / 125 · BITSAT 2010 · Physics

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

A
Drift speed
B
Resistivity
C
Resistance
Correct answer
D
Number of free electrons

Solution

Only number of free electrons is constant, other factors are temperature dependent.

Hence, the correct answer is option: 'D'.

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