Assertion A is true (wire heats up with current). Reason R is false (heating is due to collisions of electrons with metal atoms/ions, not atoms with each other).
Assertion (A): The temperature of a metal wire rises when an electric current is passed through it. Reason (R): Collision of metal atoms with each other releases heat energy.
Asked in UPPCS Prelims 1998 · Topic: Heat and Thermodynamics (Zeroth and First Laws of Thermodynamics (Internal Energy, Work, Heat, Enthalpy))
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