Lenz Law

Q. A bar magnet is moved along the axis of a copper ring placed far away from the magnet. Looking from the side of the magnet, an anticlockwise current is found to be induced in the ring. Which of the following may be true ?

1. The south pole faces the ring and the magnet moves towards it.
2. The south pole faces the ring and the magnet moves away from it.
3. The north pole faces the ring and the magnet moves towards it.
4. The north pole faces the ring and the magnet moves away from it.

Q. Which of the following can create an induced emf across the ends of a conductor?

1. Moving a conductor with respect to a magnetic field.
2. Keeping a conductor stationary in a constant magnetic field.
3. Moving the conductor and the magnet at the same rate in the same direction
4. Keeping the conductor stationary in a time-varying magnetic field.

Q. What is induced current?

Q.

Write an activity toshow the shape of magnetic field lines around a straight line conductor

Q.

What is Lenz`s law?? Explain

Q.

what is a magnetic flux

tell me in simple language with reference to electromagnetic induction

Q. Explain how Lenz law follows law of conservation of energy. [3 Mark]

Q. According to Lenz's law, the induced current in the coil will appear in a direction such that it supports the change in the magnetic flux in the coil.

1. True
2. False

Q.

Can u plz explain different ways to induce current in coil

Q. The diagram shows a spiral coil wound on a hollow cardboard tube AB. A magnetic compass is placed close to it. Current is switched on by closing the key. How will the compass needle be affected? Give reason.

Q. A current carrying solenoid is approaching a conducting loop as shown in the figure. The direction of induced current as observed by an observer on the other side of the loop will be

1. Anticlockwise
2. Clockwise
3. East
4. West