As shown below, a square loop of wire of side a moves through a uniform magnetic

Question

As shown below, a square loop of wire of side a moves through a uniform magnetic field of magnitude B perpendicular to the page at constant velocity v^vector directed to the right. Which statement regarding the electric field induced in the wires is correct for the the left and right sides of the loop? a. There is no electric field present in any side of the loop. b The electric field E^vector is directed upwards in both the right and left sides of the loop. c. The electric field E^vector is directed upwards in the left side and downwards in the right side of the loop. d. The electric field E^vector is directed downwards in both the right and left sides of the loop. e. The electric field E^vector is directed upwards in the right side and downwards in the left side of the loop. When a switch is closed, completing an LR series circuit, the time needed for the current to reach one half its maximum value is _________ time constants. a 0.693 b. 0.250 c. 1.44 d. 1.00 e. 0.500

Explanation / Answer

1)

b) The electric field E is directed upwards in both the right and left sides of the loop.

2)

0.693

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