A. 30V
B. 40V
C. 300V
D. 400V
Correct Answer:
Option C – 300V
Explanation
In general, if a charged particle is accelerated between two metal plates/a region by potential difference V volts, the work done on the charge, given by the product of the charge and the potential difference, is equal to the kinetic energy of the charge
Thus eV = K.E
1.6 x 10-19 x V = 4.8 x 10-17
∴ V = | 4.8 x 10-17 |
1.6 x 10-19 |
= 300V
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