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.

Give the SI unit of the magnetic field from Biot-Savart law.

A. Ampere
B. Tesla
C. Weber
D. Gauss
Answer» C. Weber
Discussion
2.

The magnetic field due to a current element is minimum in a plane passing through the element when it is perpendicular to its axis. State true or false.

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

Which of the following is not a point of similarity between Biot-Savart law and Coulomb s law.

A. Both fields depend inversely on the square of the distance from the source to the point of observation
B. They are not a universal law
C. The principle of superposition does not apply to both
D. Both are long-range fields
Answer» D. Both are long-range fields
Discussion
4.

A wire placed along the north-south direction carries a current of 8 A from south to north. Find the magnetic field due to a 1 cm piece of wire at a point 200 cm north-east from the piece.

A. 14 10<sup>-9</sup> T
B. 1004 10<sup>-9</sup> T
C. 204.4 10<sup>-9</sup> T
D. 1.4 10<sup>-9</sup> T
Answer» E.
Discussion
5.

Give the dimensional formula for magnetic permeability of free space.

A. [M L T<sup>-2</sup> A<sup>-2</sup>]
B. [M<sup>2</sup> L T<sup>-2</sup> A<sup>-2</sup>]
C. [M L<sup>2</sup> T<sup>-2</sup> A<sup>-2</sup>]
D. [M<sup>-1</sup> L T<sup>-2</sup> A<sup>-2</sup>]
Answer» B. [M<sup>2</sup> L T<sup>-2</sup> A<sup>-2</sup>]
Discussion
6.

State the rule that is used to find the direction of field acting at a point near a current-carrying straight conductor.

A. Cork rule
B. The right-hand thumb rule
C. Swimming rule
D. Flemings rule
Answer» C. Swimming rule
Discussion
7.

Give the SI unit of magnetic permeability of free space.

A. T A m<sup>-2</sup>
B. T A<sup>-2</sup> m
C. T A<sup>-1</sup> m
D. T A m<sup>2</sup>
Answer» D. T A m<sup>2</sup>
Discussion