30V
40V
300V
400V
Correct answer is C
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 |
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