A straight steel wire of length ' $l$ ' has a magnetic moment ‘M’. It is bent into various shapes shown in figure. Find out new magnetic moment of each shape.

Important Questions on Matter and Magnetism

MEDIUM

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Previous Year Questions)>Q 16

When a magnetic needle placed in non uniform field the needle may experierces a :-

EASY

NEET

IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Previous Year Questions)>Q 17

A magnet of magnetic moment

50 \hat{i}

A–m² placed along x-axis. Where magnetic field is

\vec{B} = (0.5 \hat{i} + 3.0 \hat{j})

tesla. The torque acting on magnet is :-

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Previous Year Questions)>Q 18

A coil of $100$ turns kept in a magnetic field, $B = 0.2 T$ , carries a current of $2 A$ as shown in the figure. Torque on the coil and which side of coil comes out from the plane of the paper :

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Previous Year Questions)>Q 19

A current carrying wire is bent to form a circular coil. If this coil is placed in any other magnetic field then for maximum torque on the coil, the number of turns will be -

HARD

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Previous Year Questions)>Q 20

A magnetic needle lying parallel to a magnetic field requires $W$ unit(s) of work to turn it through $60 °$ . The torque needed to maintain the needle in this position will be,

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IMPORTANT

Beta Question Bank for Medical: Physics>Chapter 26 - Matter and Magnetism>Exercise (Analytical Questions)>Q 1

Two tangent galvanometers