1. A uniform electric field of 200 N/C is in the x-direction. A point charge of 3μC is released from rest at the origin. What is the kinetic energy of the charge when it is at x = 4 m?
a. 2.4×10 −2 J
b. 1.6×10 −2 J
c. 3.6×10 −2 J
d. 4.8×10−2J
2, Two large horizontal metal plates are separated by 4 mm. The lower plate is at a potential of
−6V
. What potential should be applied to the upper plate to create electric field strength of 4000 V/m upwards in the space between the plates?
a. +22V
b. +10V
c. −10V
−22V
3. An ac circuit consists of a voltage source v=200sin120πt and a 6μF capacitor in series. Calculate the current established in the circuit
a. 0.32A
b. 1.24A
c. 0.64A
d. 2.13A
4. Gauss’s law says that the net flux passing through a Gaussian sphere is equal to the charge enclosed divided by?
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