Question

1. An ideal parallel- plate capacitor has a capacitance of C. If the area of the plates is halved and the distance between the plates is doubled, what is the new capacitance?

2. a proton has a. speed of 5.0x10^5 m/s at a point where the electrical potential is 500 V. It moves through a point where the electrical potential is 1000V. What is the speed at this second point? (e=1.60x10^-10C)

Answer 1

0 c = E Als slu da ad c'= E 2 (20) c'- Uls 2 Decreases four times xlo 27,42 *(1.6x10+27) + 1 (1-6x10 (sx log? = { *(1.6 X 10*3*) q su -2 ), 6 x 10 £'*(1. v 2 -27 2 (soos (6 6xlolos 5 3.873 x 10 m