ADDITIONAL EXERCISES

Author:Jharkhand Board

Jharkhand Board Physics Solutions for Exercise - ADDITIONAL EXERCISES

Simple step-by-step solutions to ADDITIONAL EXERCISES questions of Moving Charges and Magnetism from PHYSICS PART-1 : CLASS XII. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from ADDITIONAL EXERCISES with Hints & Solutions

MEDIUM
12th Jharkhand Board
IMPORTANT

A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction parallel to the axis along east to west. A wire carrying current of 7.0 A in the north to south direction passes through this region. What is the magnitude and direction of the force on the wire if the wire in the N-S direction is lowered from the axis by a distance of 6.0 cm?

HARD
12th Jharkhand Board
IMPORTANT

A uniform magnetic field of 3000 G is established along the positive z-direction. A rectangular loop of sides 10 cm and 5 cm carries a current of 12 A. What is the torque on the loop in the different cases shown in the figure? What is the force on each case? Which case corresponds to a stable equilibrium?
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MEDIUM
12th Jharkhand Board
IMPORTANT

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0·10T normal to the plane of the coil. If the current in the coil is 5·0 A, what is the total torque on the coil?

EASY
12th Jharkhand Board
IMPORTANT

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0·10T normal to the plane of the coil. If the current in the coil is 5·0 A, what is the total force on the coil,

MEDIUM
12th Jharkhand Board
IMPORTANT

A circular coil of 20 turns and radius 10 cm is placed in a uniform magnetic field of 0·10T normal to the plane of the coil. If the current in the coil is 5·0 A, what is the average force on each electron in the coil due to the magnetic field?
(The coil is made of copper wire of cross-sectional area 10-5m2 and the free electron density in copper is given to be about 1029m-3.)

HARD
12th Jharkhand Board
IMPORTANT

A solenoid 60 cm long and of radius 4·0 cm has 3 layers of windings of 300 turns each. A 2·0 cm  long wire of mass 2·5 g lies inside the solenoid (near its centre) normal to its axis; both the wire and the axis of the solenoid are in the horizontal plane. The wire is connected through two leads parallel to the axis of the solenoid to an external battery which supplies a current of 6·0 A in the wire. What value of current (with an appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire? g=9·8ms-2

MEDIUM
12th Jharkhand Board
IMPORTANT

A galvanometer coil has a resistance of 12 Ω and the metre shows full-scale deflection for a current of 3 mA. How will you convert the metre into a voltmeter of range 0 to18V?

MEDIUM
12th Jharkhand Board
IMPORTANT

A galvanometer coil has a resistance of 15 Ω, and the metre shows full-scale deflection for a current of 4mA. How will you convert the metre into an ammeter of range 0 to 6A?