Bar Magnet

Q. When two bar magnets were brought close to each other, they repelled. Determine the poles using the below figure.

1. Can be any combination
2. 1 - North, 2- South
3. 1- South, 2 - North
4. 1 - North, 2- North

Q.

A device used to test whether the current is flowing in a conductor or not is :

1. Ammeter

2. Galvanometer

3. Voltmeter

4. Magnetmeter

Q.

The neutral points of a bar magnet kept with its south pole towards the north are located _______

Q.

If a compass is taken inside a bar magnet exactly at the centre, then in which direction will it point?

1. Towards 1

2. Will keep on fluctuating between 1 and 2

3. Will keep on fluctuating between 3 and 4

4. Towards 2

Q.

The compass is circled around a bar magnet. State at which point around the bar magnet, the compass will show the maximum deflection?

1. Near the poles

2. Near the north pole only

3. Near the south pole only

4. Halfway between south pole and north pole

Q. Which of the following devices use electromagnet?

1. Electric heater
2. Electric fuse
3. Electric bell
4. Bulb

Q. Why does a compass needle get deflected when brought near a bar magnet?
[1 Mark]

Q. Take two bar magnets. Suspend one magnet freely with the help of a silk thread. Hold the other magnet in your hand. Take the north pole of the magnet, you are holding, near the north pole of the suspended magnet. What will be your observation?

1. They will repel each other
2. They will attract each other
3. None of these
4. No interaction will be observed

Q. A current is flowing in the circular loop. The magnetic field lines point from B to A inside the loop. The north pole of loop is__________.

1. B
2. A
3. A if the current is small
4. B if the current is large

Q.

Define Induction.

Q. why is electromagnetic induction so called?
A coil to sensitive galvanometer is held stationary.A bar magnet with its North pole facting coil is moving towards the coil at a certain speed. The galvanometer needle shows deflection of 10 divisions towards right of the center of the scale.How will the reading on the galvanometer scale be affected if the south pole of the bar magnet facing the coil is moved away at the same speed?

Q. Consider the following statements and choose the correct option.
1. Magnetic field lines around a magnet cannot intersect.
2. When magnetic field lines intersect, the compass at the point of intersection flutuates between the two directions.
Choose the correct option.

1. 1 and 2 are true, and are independent
2. Only 2 is true
3. 1 and 2 are true, and 2 is the reason why 1 is true
4. Only 1 is true

Q.

Assertion: It is not necessary that every magnet has one north pole and one south pole.

Reason: It is a basic fact that magnetic poles occur is pairs

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true and R is not correct explanation of A.
3. A is true, but R is false
4. A is false, but R is true

Q.

A bar magnet is suspended freely, it comes to rest in:

1. east-west direction

2. north-south direction

3. north-east direction

4. south-east direction

Q.

In the given figure, the galvanometer will not have a deflection if:​

1. the bar magnet is moved in the direction shown

2. the bar magnet is moved in the opposite direction

3. the bar magnet is kept stationary

4. the wire loop on the conducting cylinder is moved towards the bar magnet