Electromagnetic Induction and Alternating Current 7 Question 11
11. As shown in the figure, and are two coaxil conducting loops separated by some distance. When the switch is closed, a clockwise current flows in (as seen by ) and an induced current flows in . The switch remains closed for a long time. When is opened, a current flows in .
Then the direction
(a) respectively clockwise and anti-clockwise
(b) both clockwise
(c) both anti-clockwise
(d) respectively anti-clockwise and clockwise
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Answer:
Correct Answer: 11. (d)
Solution:
- When switch
is closed magnetic field lines passing through increases in the direction from right to left. So, according to Lenz’s law, induced current in i.e. will flow in such a direction, so that the magnetic field lines due to passes from left to right through .
This is possible when