Multiple choice questions XIV — task. Science CBSE, Class 10.

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1. The temperature of a metal wire rises when an electric current passes through it because

collision of metal atoms with each other releases heat energy
collision of conduction electrons with each other releases heat energy
when the conduction electrons fall from higher energy level to lower energy level heat energy is released
collision of conduction electrons with the atoms of metal give them energy which appears as heat

2. There is a current of \(4.8\ ampere\) in a conductor. The number of electrons that cross any section normal to the direction of flow per second, is

\(1 \times 10^{19}\)
\(2 \times 10^{19}\)
\(3 \times 10^{19}\)
\(7.68 \times 10^{20}\)

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14. Multiple choice questions XIV

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