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.
