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MCQs For Moving Charges and Magnetism
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MCQs For Moving Charges and Magnetism
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15 Questions

1. When a magnetic compass needle is carried nearby to a straight wire carrying current, then (I) the straight wire cause a noticeable deflection in the compass needle. (II) the alignment of the needle is tangential to an imaginary circle with straight wire as its centre and has a plane perpendicular to the wire
2. A charged particle is moving on circular path with velocity v in a uniform magnetic field B, if the velocity of the charged particle is doubled and strength of magnetic field is halved, then radius becomes
3. The nature of parallel and anti-parallel currents are
4. Which one of the following is correct statement about magnetic forces?
5. Two a-particles have the ratio of their velocities as 3 : 2 on entering the field. If they move in different circular paths, then the ratio of the radii of their paths is
6. If an electron is moving with velocity \(\vec{ν}\) produces a magnetic field \(\vec{B}\), then
7. The magnetic moment of a current I carrying circular coil of radius r and number of turns N varies as
8. A moving coil galvanometer can be converted into an ammeter by
9. In an inertial frame of reference, the magnetic force on a moving charged particle is \(\vec{F}\) Its value in another inertial frame of reference will be
10. A charged particle is moving in a cyclotron, what effect on the radius of path of this charged particle will occur when the frequency of the ratio frequency field is doubled?
11. A current carrying loop is placed in a uniform magnetic field. The torqe acting on it does not depend upon
12. The conversion of a moving coil galvanometer into a voltmeter is done by
13. A strong magnetic field is applied on a stationary electron. Then the electron
14. Which of the following is not correct about cyclotron?
15. A short bar magnet has a magnetic moment of 0. 65 J T-1, then the magnitude and direction of the magnetic field produced by the magnet at a distance 8 cm from the centre of magnet on the axis is

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