Magnetism Quiz 3 – Punjab Meritorious School Preparation Portal

Welcome to your 21st Sep Magnetism Quiz 3 CBT TEST

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Name

School Name with City

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A current of 3 A is flowing in a plane circular coil of radius 4 cm and number of turns 20. The coil is placed in a uniform magnetic field of magnetic induction 0.5 T. Then the dipole moment of the coil is -

In the above question, torque acting on magnet is -

Two isolated point poles of strength 30 A-m and 60 A-m are placed at a distance of 0.3 m. The force of repulsion is -

2 × 10–3 N

2 × 10–4 N

2 × 105 N

2 × 10–5 N

The points A and B are situated perpendicular to the axis of 2 cm long bar magnet at large distances x and 3 x from the centre on opposite sides. The ratio of magnetic fields at A and B will be approximately equal to -

27 : 1

1 : 27

9 : 1

1 : 9

A bar magnet is cut into two equal halved by a plane parallel to the magnetic axis. Of the following physical quantities the one which remains unchanged is -

Pole strength

Magnetic moment

Intensity of magnetisation

Moment of inertia

Magnetic lines of force are -

continuous

discontinuous

sometimes continuous and sometimes discontinuous

nothing can be said

A compass needle is placed at the magnetic pole it -

points N–S

points E–W