EASY
12th CBSE
IMPORTANT
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A student wants to increase the range of an ammeter from 1 mA to 5 mA. What should be done to the shunt resistance?

Important Questions on Magnetic Effect of Current

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 77
What is the direction of the force acting on a charged particle q, moving with a velocity v→ in a uniform magnetic field B→ ?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 78
Two identical charged particles moving with same speed enter a region of uniform magnetic field. If one of these enters normal to the field direction and the other enters along a direction at 30° with the field, what would be the ratio of their angular frequencies?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 79
A α-particle and a proton are moving in the plane of the paper in a region where there is a uniform magnetic field B→ directed normal to the plane of the paper. If the two particles have equal linear momenta, what will be the ratio of the radii of their trajectories in the field?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 80
Why should the spring/suspension wire in a moving coil galvanometer have low torsional constant?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 81
The coils, in certain galvanometers, have a fixed core made of a non-magnetic metallic material. Why does the oscillating coil come to rest so quickly in such a core?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 82
A long straight wire carries a current I along the positive y-direction. A particle of charge +Q is moving with a velocity v→ along the x-axis. In which direction will the particle experience a force?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 83
Two particles A and B of masses m and 2 m have charges q and 2 q respectively. Both these particles moving with velocities v1 and v2 respectively in the same direction enter the same magnetic field B acting normally to their direction of motion. If the two forces FA and FB acting on them are in the ratio 1:2, find the ratio of their velocities.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 4 - Magnetic Effect of Current>Text Based Exercises>Q 84

A beam of α particles projected along +x-axis experiences a force due to magnetic field along the +y-axis. What is the direction of the magnetic field?

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