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13.A particle, having a charge +5 C, is initially at rest at the point x = 30 cm on the x axis. Theparticle begins to move due to the presence of a charge Q that is kept fixed at the origin. Findthe kinetic energy of the particle at the instant it has moved 15 cm from its initial position if(a) Q =+15uC and (b) Q = -15°C |
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