12. A large pebble sitting alone in a room (fixed in place) carries an electrical charge of 7MC. I have another, smaller pebble with a charge of 2uC. I wish to place the small pebble somewhere in the room where it will feel an electric field with a magnitude of 10, 000 N/C. Where should I put it? The answer is 2.5 m away from large pebble. Please explain how this was determined 22. The electric potential is measured 10 meters away from a small particle. The potential there is measured to be 90 Volts. What is the charge of the particle? The answer is 1*10^-7C please explain tvhyl