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1. Two charged particles exert an electric force of 16 N on each other. What will the magnitude of the force be if the distance

1. Two charged particles exert an electric force of 16 N on each other. What will the magnitude of the force be if the distance between the particles is reduced to one-half of the original separation? If the original distance between the particles is now restored, how much larger would the charge on either one of the particles have to become to yield the same force that was present when the particle separation was only one- half its original value?

3. A particle having a positive charge of 2.0 x 10^-6 C experiences an upward force of 8 N when placed at a certain location in space. What is the magnitude and direction of the electric field at that point? What would be different about your answer if the particle possessed a negative charge of 2.0 x 10^-6 C?

5. A lightning stroke lasts 0.05 s and involves a flow of 100 C. What is the current?

7. A calculator draws a current of 0.0001 A for 5 min. How much charge flows through it?

9. A 120-V circuit in a house is equipped with a 20-A fuse that will "blow" if the current exceeds 20 A. What is the smallest resistance that can be plugged into the circuit without causing the fuse to blow?

11. The lightbulb used in a computer projector has a resistance of 80-ohm . What is the current through the bulb when it is operating on 120 V?

13. A 150-ohm resistor is connected to a variable-voltage power supply.

15. An electric eel can generate a 400-V, 0.5-A shock for stunning its prey. What is the eel's power output?

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