MEDIUM
JEE Advanced
IMPORTANT
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Assertion: Basic difference between an electric line and magnetic line of force is that former is discontinuous and the latter is continuous or endless.

Reason: No electric lines of forces exist inside a charged conductor but magnetic lines do exist inside a magnet.

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Important Questions on Magnetism

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 4 - Magnetism>[ Level 2 ]>Q 17

Assertion: The ferromagnetic substances do not obey Curie's law.

Reason: At Curie point, ferromagnetic substances start behaving as a paramagnetic substance.

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 4 - Magnetism>[ Level 2 ]>Q 18
Assertion: The properties of paramagnetic and ferromagnetic substances are not affected by heating.
Reason: As temperature rises, the alignment of molecular magnets gradually decreases.
EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 4 - Magnetism>[ Level 2 ]>Q 19

Assertion: A soft iron core is used in a moving coil galvanometer to increase the strength of the magnetic field.

Reason: From soft iron more number of magnetic lines of force passes.

EASY
JEE Advanced
IMPORTANT
Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 4 - Magnetism>[ Level 2 ]>Q 20
Assertion: Earth's magnetic field inside a closed iron box is less than compared to the outside.
Reason: The magnetic permeability of iron is low.