An electron at rest has a charge of `1.6 × 10^(–19) C.` It starts moving with a velocity v = c/2, where c is the speed of light, then the new charge on it is -

The percentage increase in the rest mass of an electron when it is moving at a speed of 0.6 c where c is the speed of light, is

A body has a positive charge of 8xx10^(-19)C . It has :

A test charge of 1.6 xx 10^-19 C is moving with velocity v = (2hati+3hatj) m/sec in magnetic field vec B = (2hati + 3hatj) Wb m^-2 . Find the force acting on the test charge.

An electron , with charge of -1.60 xx 10^(19) C , accelerates from rest through a potential difference V. A proton , with a charge of + 1.60 xx 10^(-19) C , accelerates from rest through a potential difference -V . Is the final speed of the electron (a) more than , (b) less than , or (c ) same as the final speed of the proton ?

An electron , with charge of -1.60 xx 10^(19) C , accelerates from rest through a potential difference V. A proton , with a charge of + 1.60 xx 10^(-19) C , accelerates from rest through a potential difference -V . Is the final speed of the electron (a) more than , (b) less than , or (c ) same as the final speed of the proton ?