MCQ
A magnetic field can be produced by :
  • A
    moving charge only
  • B
    varrying electric field
  • (a) and (b) both
  • D
    None of these

Answer

Correct option: C.
(a) and (b) both
C

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

The magnetic compass is not useful for navigation near the magnetic poles, since:
A 220 V A.C. supply is connected between points A and B (Fig.). What will be the potential difference V across the capacitor?

A ray of light passes through an equilateral glass prism in such a manner that the angle of incidence is equal to the angle of emergence and each of these angles is equal to 3/4 of the angle of the prism. The angle of deviation is

(a) 45°

(b) 39°

(c) 20°

(d) 30°

A charged particle goes undeflected in a region containing an electric and a magnetic field. It is possible that
  1. $\overrightarrow{\text{E}}||\overrightarrow{\text{B}},\ \overrightarrow{\text{v}}||\overrightarrow{\text{E}}$
  2. $\overrightarrow{\text{E}}$ is not parallel to $\overrightarrow{\text{B}}$
  3. $\overrightarrow{\text{v}}||\overrightarrow{\text{B}}$ but $\overrightarrow{\text{E}}$ is not parallel to $\overrightarrow{\text{B}}$
  4. $\overrightarrow{\text{E}}||\overrightarrow{\text{B}}$ but $\overrightarrow{\text{v}}$ is not parallel to $\overrightarrow{\text{E}}$
Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If an X-ray is passed through the same setup, the radius of the diffraction disc will be:

A point charge +q  is placed at the centre of a cube of side L. The electric flux emerging from the cube is

(a)  

(b) Zero

(c)

(d)

A circular loop is kept in that vertical plane which contains the north-south direction. It carries a current that is towards north at the topmost point. Let A be a point on the axis of the circle to the east of it and B a point on this axis to the west of it. The magnetic field due to the loop
Work done in moving an object through an equipotential surface is:

If a current of 10 A flows in one second through a coil, and the induced e.m.f. is 10 V, then the self-inductance of the coil is

(a)  

(b)  

(c)  

(d) 1 H

The spectrum of light emitted by a glowing solid is

(a) Continuous spectrum

(b) Line spectrum

(c) Band spectrum

(d) Absorption spectrum