DVC Magnitude of The Force Electrostatics Questions
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1. Two charged bodies, separated by a certain distance, exert a force of 480 mN on each other. (m stands for “milli”= one thousandth, or 10-3 . Therefore, mN means “milliNewtons”).
a) What will be the force if they are moved so that they are 8 times farther apart?
b) What will be the force if they are moved (from the original distance) so that they are only 1/8 as far apart?
2. What is the magnitude of the force a 10 ?C charge exerts on a 3.0 mc charge 2.0 meters
away? (? is the Greek letter “mu” and it stands for “micro” = one millionth, or 10-6. Therefore, ?c means “microcoulombs”. As in problem #1, m stands for “milli” and thus mc means “millicoulombs”).
3. Suppose that a 4.0 Coulomb charge has a Potential of 140 volts. How much Electrical Potential Energy (EPE) would the charge have?
4. A service station charges a battery using a 5.5 A current for 6.0 hours. How much charge passes through the battery?
5. What is the resistance of a toaster that uses 5.0 amps on a 120 volt line?
6. Suppose that one wanted to work with a 0.75 amp current, but first it was necessary to drive the current through a 32,000 ohm resistance. What voltage would be necessary?
