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Kinetic energy of an electron, which is accelerated in a potential difference of 100 V is
- 1.6 × 10^(-17) J
- 1.6 × 10^(-19) J
- 1.6 × 10^(-21) J
- 1.6 × 10^(-25) J
Correct answer: 1.6 × 10^(-17) J
Solution
The kinetic energy of an electron accelerated through a potential difference V is given by K.E. = eV, where e = 1.6 × 10^(-19) C and V = 100 V. Substituting, K.E. = (1.6 × 10^(-19)) × 100 = 1.6 × 10^(-17) J.
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