Question

Please show work.

fultiple Choice: (Circle the best answer from the choices given.) A cylindrical wire has a resistance R. If the wire's length is doubled, and the radius is cut in half, then R changes by a factor of (a) 1 (b) 2 (c) 4 (d) 8 2. A charged, unconnected, capacitor's plate separation distance is tripled. The energy stored on the capacitor changes by a factor of (a) 9 (b) 3 (c) H (d) 3 3. An uncharged RC circuit contains a battery with an electric potential of 15V. If the C 16pF and R-_ 2009, what is the current out of the battery at t ? (a) 0 A (b) 0.0038 A (c) 0.075 A (d) 0.94 A 4. Two charges are separated by a distance d, and cach feels a force, F. If the distance is doubled, the force changes by a factor of (a) 2 (b) 1 (d) A

Answer 1

2- p. (d) g 2 3 attO d) 4-