**PHY2054 - Exam 1 - Fall 1997 - Selman Hershfield
**

**Answers**
- Answer = (4) 55 N
- Answer = (3) 256 degrees
- Answer = (3) 1
- Answer = (2) 0.23 N away from the other sphere
- Answer = (2) Q
_{1} > 0 and Q_{2} < 0
- Answer = (2) If the rod is removed with the ground in place, the net charge on the electroscope is negative.
- Answer = (5) Both of the rods can be neutral metallic rods.
- Answer = (1) 0 degrees
- Answer = (1) -565 V/m
- Answer = (3) III
- Answer = (5) Q
_{1} > 0, Q_{2} < 0, |Q_{1} | < |Q_{2} |
- Answer = (2) -2 micro-C
- Answer = (2) 1.13 x 10
^{11} V m
- Answer = (2) -16 J
- Answer = (5) 5 x 10
^{10} m/s
- Answer = (3) (i) R, (ii) P
- Answer = (4) +2.25x10
^{5} V
- Answer = (5) II and III
- Answer = (2) F, E
- Answer = (5) +15 x 10
^{-6} J