Explore topic-wise MCQs in Physics Questions and Answers.

This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

A long straight wire of radius x carries a steady current I. The current is uniformly distributed across its cross section. Calculate the ratio of the magnetic field at \(\frac {x}{4}\) and 8x.

A. 4
B. 3
C. 2
D. 1
Answer» D. 1
Discussion
2.

Which law can ampere’s circuital be derived from?

A. Gauss Law
B. Newton’s Law
C. Kirchhoff’s Law
D. Biot-Savart Law
Answer» E.
Discussion
3.

The angle at which a charged particle moves through a magnetic field with a velocity, having zero magnetic force is 180o.

A. True
B. False
Answer» C.
Discussion
4.

Which one of the following graphs depict the magnetic field B at a distance r from a long straight wire carrying current varies with distance r?

A. a)
Answer» C.
Discussion
5.

Identify the expression for ampere’s circuital law from the following?

A. ∮ B .dl = μ0I
B. ∮ B .dl = \( \frac {\mu_0}{I}\)
C. ∮ B .dl = 2μ0I
D. ∮ B .dl = 4μ0I
Answer» B. ∮ B .dl = \( \frac {\mu_0}{I}\)
Discussion