MHT CET202521 Apr 2025Evening ShiftPhysicsElectromagnetic InductionActual
A conducting ring of certain resistance is falling towards a current carrying straight long conductor. The ring and conductor are in the same plane. Then
Options
- Ainduced current in the coil is zero.
- Binduced current in the coil is anticlockwise.
- Cinduced current in the coil is clockwise.
- Dring will come to rest.
Correct answer
C. induced current in the coil is clockwise.
Step-by-step solution
The induced current direction is determined by applying Faraday's Law and Lenz's Law. The magnetic field above a rightward-carrying conductor points out of the page, as given by the right-hand thumb rule. As the ring falls toward the conductor, the magnetic field strength B = ₀ I 2 r increases since distance r decreases. This results in an increasing magnetic flux directed out of the page through the ring. Lenz's Law requires that the induced current opposes this flux increase. The induced current must therefore pr