Question

# Assertion (A): 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. Reason (R): Induced e.m.f. is proportional to rate of change of magnetic field while induced current depends on resistance of wire.

A
Both (A) and (R) are true, and (R) is the correct explanation of (A)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Both (A) and (R) are true, but (R) is not the correct explanation of (A)
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
(A) is true but (R) is false
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
(A) is false but (R) is true
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

## The correct option is D (A) is false but (R) is trueAs we know, induced e.m.f. e=−dϕdt Flux linkage with a coil is independent of the material. So emf will be same as the loops are identical in shape. But induced current iind=(−dϕdt)R=eR And R=ρlA [it depends on the property of the material.] Hence, induced current will depend upon the material because Resistivity (ρ) is material dependent. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, (D) is the correct answer.

Suggest Corrections
0
Join BYJU'S Learning Program
Select...
Related Videos
Dimensional Analysis
PHYSICS
Watch in App
Explore more
Join BYJU'S Learning Program
Select...