24we know that KE avg =KbT/2
when temp inc. => avg KE increases => drift speed naturally increases
also resistance and restivity are directly related to temp
=> the only qty that doesnt change on temp change is no. of free electrons
which of the following quantities do not change when a resistor connected to a battery is heated due to current ?
(a)drift speed (b)resistivity
(c)resistance (d)number of free electrons
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4 Answers
24
3eure we can have thermal energy produced by the current may exceed the ionisation energy so there by we can produce more free electron.
