| Assertion (A): When two identical loops of copper and Aluminium are rotated with same speed in the same magnetic field, the induced e.m.f. will be same. |
| Reason (R): Resistance of the two loops are equal. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is true
Correct Answer: C
Solution :
| Option [c] is correct. |
| Explanation: Induced e.m.f. in a rotating loop in a magnetic field depends on the area of the loop, number of turns, speed of rotation and magnetic field strength. It does not depend on the material of the coil. So, when two rotated with same speed in the same magnetic field, the induced e.m.f. will be same. So, the assertion is true. |
| Resistance of the two loop connot be equal. Resistance of copper loop is less than that of the aluminium loop. So, the reason is false. |
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