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- An aluminium ring B faces an electromagnet A. The current I through A can be altered: <img alt="" src="https://cdn.entrance360.com/media/uploads/2023/08/11/aa.PNG" style="height:87px; wid
- #Joint Entrance Examination Main
- #Class 12
- #Engineering
- #Physics
- #Electromagnetic Induction and Alternating currents
An aluminium ring B faces an electromagnet A. The current I through A can be altered:
Option: 1
whether I increases or decreases, B will not experience any force
Option: 2
if I decreases, A will repel B
Option: 3
if I increases, A will attract B
Option: 4
if I increases, A will repel B
Answers (1)
If current through A increases, magnetic field ()? linked with coil B increases. Hence, anti-clockwise current induced in coil B. As shown in figure both the currents produce repulsive effect.
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