Magnetism and Its Principles

Assertion: Bar magnets can attract or repel each other. Reason: This happens due to the magnetic force between their poles.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion: Two magnets always attract each other. Reason: All poles of magnets are attractive.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion: Two bar magnets placed with like poles facing will stay still. Reason: Like poles attract each other.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion: A magnet loses its magnetism when heated strongly. Reason: Heating disturbs the alignment of magnetic domains.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion: The compass needle deflects when a bar magnet is brought near it. Reason: The compass needle is a magnet and responds to the magnetic field.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion: When a magnet is brought near a compass needle, it always attracts it. Reason: Compass needles are made of plastic.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion (A): Compass needle deflects even when glass is placed between it and a magnet. Reason (R): Glass is transparent and conducts magnetic force.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion (A): Magnetic force can work through various non-magnetic materials. Reason (R): Magnetic field does not require direct contact to influence magnetic objects.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion (A): Magnetic field lines can pass through glass. Reason (R): Glass contains no free electrons to respond to magnetic fields.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true

Assertion (A): A magnet can attract a pin even if a sheet of plastic is placed between them. Reason (R): Magnetic fields can pass through non-magnetic materials.

• Both A and R are true, and R explains A

• Both A and R are true, but R does not explain A

• A is true, but R is false

• A is false, but R is true