For the situation described in each of the five diagrams below, indicate what th
ID: 1373758 • Letter: F
Question
For the situation described in each of the five diagrams below, indicate what the resulting current flow will be in the small resistor, R. Note that B (magnetic Field) is uniform over the entire region where it is shown.
Choose from the following answers:
A) Current will flow from right to left.
B) Current will flow from left to right.
C) No current will flow.
D) It is impossible to uniquely determine the sense of the current from the given information.
E.g., if the answer to the first situation is right-to-left, to the last situation that no current will flow, and to all the others that the current will flow from left to right, enter ABBBC.
BBACC
BBBCC
BABCC
BBBAC
AABAC
ABBAC
The current I through the solenoid varies as shown in the graph below. What is the current through the resistor R at time 8?Explanation / Answer
1)The magnetic field induced by flux variation (faraday's law) must beoppsed to theone present, thus current circulates from right to left (A)
2)For the same reason corect answer is (B) (B is extinng the sheet plane)
3)Again from lenz law, from left to right (B)
4) Same as 1)
5) at t=8 I=0, so no magnetic field in the solenoid, thus no current induced in the resistor (C)
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