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Class 12 Physics Practice Test: Motion in a Magnetic Field
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Class 12 Physics Practice Test: Motion in a Magnetic Field
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7 Questions

1. A proton enters a magnetic field of flux density 5 T with a velocity of 5 × 107 ms-1 at an angle of 30o with the field. Find the force on the proton.
2. Which of the following will experience a maximum force, when projected with the same velocity perpendicular to the magnetic field : (i) α-particle, and (ii) β-particle?
3. A positive charge is moving vertically upwards. When it enters a region of magnetic field directed towards north, what is the direction of the force on the charge?
4. A charged particle in a plasma trapped in a magnetic bottle leaks out after a millisecond. What is the total work done by the magnetic field during the time the particle is trapped?
5. In a certain arrangement, a proton does not get deflected while moving through a magnetic field region. Under what condition is it possible?
6. Force on a charge ‘q’ moving with a velocity ‘v’ in a magnetic field is given by F = qvB. State true or false.
7. An electron moving with a velocity of 15 ms-1 enters a uniform magnetic field of 0.2 T, along a direction parallel to the field. What would be its trajectory in this field?

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