Explore topic-wise MCQs in Physics.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Physics knowledge and support exam preparation. Choose a topic below to get started.

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.

A. 0.2 × 10-11 N
B. 2 × 10-11 N
C. 20 × 10-11 N
D. 200 × 10-11 N
Answer» C. 20 × 10-11 N
Discussion
2.

Force on a charge ‘q’ moving with a velocity ‘v’ in a magnetic field is given by F = qvB. State true or false.

A. True
B. False
Answer» C.
Discussion
3.

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?

A. Maximum
B. Minimum
C. Zero
D. Depends on the strength of the magnetic field
Answer» D. Depends on the strength of the magnetic field
Discussion
4.

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?

A. Both α-particle and β-particle
B. None
C. β-particle
D. α-particle
Answer» E.
Discussion
5.

In a certain arrangement, a proton does not get deflected while moving through a magnetic field region. Under what condition is it possible?

A. F = 0
B. F = 180 N
C. F = -180 N
D. F = 3600 N
Answer» B. F = 180 N
Discussion
6.

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?

A. Elliptical
B. Straight path
C. Helical
D. Circular
Answer» C. Helical
Discussion
7.

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?

A. Up
B. Down
C. Left
D. Right
Answer» D. Right
Discussion