The temperature of a metal wire rises when an electric current passes through it because:
Correct answer: C. Collision of conduction electrons with the atoms of metal give them energy which appears as heat
- A. Collision of metal atoms with each other releases heat energy
- B. Collision of conduction electrons with each other releases heat energy
- C. Collision of conduction electrons with the atoms of metal give them energy which appears as heat
- D. All of these
Explanation
.Temperature is defined as the measure of average kinetic energy in the system. Therefore as more electrons collide with atoms, the wire gains more kinetic energy and therefore its temperature increases.
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About Current Electricity
Steady current relates charge flow to potential difference, resistance and resistivity, including how temperature changes a conductor's resistance. Sources with internal resistance have terminal voltage below their emf when delivering current, and maximum power output occurs under a specific load condition rather than at zero resistance.
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