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Kinetic energy of an electron, which is accelerated in a potential difference of 100 V is
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- 1.6 × 10-17 J
- 1.6 × 10-19 J
- 1.6 × 10-21 J
- 1.6 × 10-25 J
Correct Option: A
Potential difference (V) = 100 V. The kinetic energy of an electron = 1 eV = 1 × (1.6 × 10–19)
= 1.6 × 10–19 J. Therefore kinetic energy in
100 volts = (1.6 × 10–19) × 100 = 1.6 × 10–17J.
[Alt : K.E. = qV
= 1.6 × 10–19 × 100 J = 1.6 × 10–17]
