Magnetic Effect of Electric Current Quiz 4 – Punjab Meritorious School Preparation Portal

Welcome to your 8th Sep Magnetic Effect of Electric Current Quiz 4 CBT TEST

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The magnetic field at the centre of an equilateral triangular loop of side 2L and carrying a current i is -

Curie temperature is the temperature above which -

a paramagnetic material becomes diamagnetic

a ferromagnetic material becomes diamagnetic

a paramagnetic material becomes ferromagnetic

a ferromagnetic material becomes paramagnetic

A long solenoid has n turns per metre and current I amp is flowing through it. The magnetic field at the ends of the solenoid is -

A wire of length L metre carrying a current I ampere is bent in the form of a circle. Its magnitude of magnetic moment will be -

In a cyclotron, if a deuteron can gain an energy of 40 MeV, then a proton can gain an energy of -

40 MeV

80 MeV

20 MeV

60 MeV

An equilateral triangular loop of side l carries a current I. It is placed in a magnetic field B such that the plane of loop is in the direction of B. The torque on the loop is-

A magnet is moved towards a coil (i) quickly (ii) slowly; then the induced charge is -

larger in case (i)

smaller in case (i)

equal in both cases

larger or smaller depending upon radius of the coil

A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associate magnetic moment µ is given by -

A circular coil of 20 turns and radius 10 cm is placed in uniform magnetic field of 0.10 T normal to the plane of the coil. If the current in coil is 5 A, then the torque acting on the coil will be -

31.4 Nm

3.14 Nm

0.314 Nm

zero

A copper wire of diameter 1.6 mm carries a
current i. The maximum magnetic field due to this wire is 5 × 10^–3 The value of i is -

40 A

5 A

20 A

2 A

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