Question 1:

Given that an electron starts from rest in a uniform field, what potential difference is needed to give it the following speed: a) 360 m/S: b) 10.3 km/s: c) 0.08 c, where c is the speed of light:External work equal to 7 x 10 J is needed to move a -4nC charge at constant speed to a point at which the potential is -50 V. What is the potential at the initial point?A lightning flash maytransfer up to 33 U of charge through a potential difference of 2 X ll}3 V. all How much energjif does this involve? State your answer in EV; axle\" ctr b} For how long could this much energy light a 12G W light bulb? C] hours