Electro Magnetic Induction And Alternating Currents Question 390

Question: An aluminium ring B faces an electromagnet A. The current I through A can be altered [Kerala PET 2002]

Options:

A) Whether I increases or decreases, B will not experience any force

B) If I decrease, A will repel B

C) If I increases, A will attract B

D) If I increases, A will repel B

Show Answer

Answer:

Correct Answer: D

Solution:

If current through A increases, crosses (X) linked with coil B increases, hence anticlockwise current induces in coil B. As both the current produces repulsive effect.



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