A charge q is accelerated through a potential difference of V. the kin

1.	A charge q is accelerated through a potential difference of V. the kinetic energy gain by charge is(a) q V (b) V / q(c) V (d) q / V
Answer» GIVEN: A charge q is accelerated through a potential difference of V. To find: Kinetic ENERGY gained by charge? Calculation: In these type of questions, its BEST to apply the concept of mechanical energy conservation. According to CONSERVATION OF MECHANICAL ENERGY: The MAGNITUDE of change in potential energy will be equal to the magnitude of change in the kinetic energy. $\therefore \: \| \Delta KE \| = \| \Delta PE \|$ $\implies\: \| \Delta KE \| = charge \times (potential \: difference)$ $\implies\: \| \Delta KE \| = q \times V$ $\implies\: \| \Delta KE \| = q V$ So, gain in KE by charge is qV.