Q. 34.4( 11 Votes )

In a TV picture tube electrons are ejected from the cathode with negligible speed and reach a velocity of 5 × 106 m/s in travelling one centimeter. Assuming straight line motion, find the constant force exerted on the electron. The mass of the electron is 9.1 × 10-31 kg.

Answer :

Given: initial velocity


Final velocity


Distance


Mass of the electron=


Using the equation of motion



Thus, acceleration


Thus, the force


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