As shown in Figure 7, a charge of 3.2nC is released from rest in a uniform elect
ID: 1520469 • Letter: A
Question
As shown in Figure 7, a charge of 3.2nC is released from rest in a uniform electric field of magnitude 415 N pointing m the positive x-direction. The charge moves 3.40 cm, from point A to point B. 19. What was the electric force acting on this charge? 20. How much work was done by the electric force between A and B? 21. What is the change in electric potential energy of the charge-field system? For the circuit shown in the Figure 6, R is 2 ohm and the ammeter reads 0.27 A. 22. Find the voltage across the 5.0 ohm resistor. 23. What is the reading of the voltmeter? 24. Assuming the internal resistance of the battery to be 0.2ohm, find the emf of the battery.Explanation / Answer
Figure is needed to answer 21
22)
V = IR = 0.27*5=1.35 V
23)
V = IR = 0.27*2 = 0.54V
24) emf = 1.35 + 0.54 +0.2*0.27 = 1.944 V
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