EASY
CUET (UG)
IMPORTANT
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A circular loop and a square loop are formed from two wires of same length and cross section. Same current is passed through them. Then the ratio of their dipole moments is

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Important Questions on Magnetism and Matter

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 15
Two magnets have the same length and the same pole strength. But one of the magnets has a small hole at its center. Then
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 16
A short bar magnet placed with its axis at θ=30°, with a uniform external magnetic field of 0.25 T experiences a torque of 4.5 ×10-2 N m. Magnetic moment of the magnet is
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 17
The areas of cross-section of three magnets of same length area A,2A and 6A respectively. The ratio of their magnetic moments will be
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 18
The magnetism of a magnet is due to
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 19
Two magnets have the same length and the same pole strength, but one of the magnets has a small hole at its centre. Then
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 20
Rate of change of torque τ with deflection θ is maximum for a magnet suspended freely in a uniform magnetic field of induction B, when
EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 21

Assertion: The net magnetic flux coming out of a closed surface is always zero.

Reason: Unlike poles of equal strength exist together.

EASY
CUET (UG)
IMPORTANT
Achieve CUET (UG) Physics Practice Book>Chapter 5 - Magnetism and Matter>Exercise>Q 22
Assertion: The magnetic flux through a closed surface containing a bar magnet is zero.

Reason: Gauss's law is applied in the case of electric flux only.