Answer :
Answer:As the bar moves upward through the constant magnet
ic field region, the area of the loop decreases, so
the flux through the loop
decreases. By Lenz’s law, any induced current will
tend to oppose the decrease. Using right hand rule
we know that magnetic field
inside the loop due to a ccw current comes out of t
he plane. Therefore a ccw current will create a str
onger magnetic field inside
the loop, tending to increase the flux.
Explanation:
The direction of the induced current is opposite to the magnetic field.
Lenz law states that, the induced current in a loop of wire is always in opposite direction to the motion producing it. This law is explained diagrammatically in the image attached to this answer.
If the north pole of the magnet move towards the coil, then the coil acquires a north polarity and the induced current flows in the opposite direction.
Hence, induced current in the loop will flow in opposite direction to the magnetic field according to Lenz law.
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