Question

Statement I: The induced e.m.f. and current will be same in two identical loops of copper and aluminium, when rotated with same speed in the same magnetic field.
Statement II: Induced e.m.f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.

• A. If both statements are true and statement II is the correct explanation of statement I.
• B. If both statements are true but statement II is not the correct explanation of statement I.
• C. If statement I is true but statement II is false.
• D. If statement I is false but statement II is true.

Answer 1

Answer: (D)

Since both the loops are identical (same area and number of turns) and moving with a same speed in same magnetic field, therefore, same emf is induced in both the coils. But the induced current will be more in the copper loop as its resistance will be lesser as compared to that of the aluminium loop.