MCQ
A magnetic field cannot exert any force on a:
  • A
    Moving magnet
  • B
    Stationary magnet
  • C
    Moving charge
  • D
    Stationary charge

Answer

  1. Stationary charge

Explanation:

Magnetic fields are produced by magnetic bodies (Moving or stationary).

Moving charges produce electromagnetic fields. Stationary charges produce electric fields alone.

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

Light is:
The frequency of revolution of a charged particle in a cyclotron does not depend on ‘X’. Identify X.

If the binding energy of the deutrium is 2.23 MeV. The mass defect given in a.m.u. is

(a) – 0.0024

(b) – 0.0012

(c) 0.0012

(d) 0.0024

One cannot see through fog because .......... :

In radioactive disintegration $\alpha$-particle, $\beta$-particle and $\gamma$-rays are emitted. Out of these which has highest ionisation power ?
Two parallel, long wires carry currents i1 and i2 with i1 > i2. When the currents are in the same direction, the magnetic field at a point midway between the wires is $10 \mu\text{T}.$ If the direction of i2 is reversed, the field becomes $30 \mu\text{T}.$ The ratio $\frac{\text{i}_1}{\text{i}_2}$ is:
  1. 4
  2. 3
  3. 2
  4. 1

Assertio : Hydrogen atom consists of only one electron but its emission spectrum has many lines.  

Reason  : Only Lyman series is found in the absorption spectrum of hydrogen atom whereas in the emission spectrum, all the series are found.

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

NAND and NOR gates are called universal gates primarily because they:

A galvanometer of 25 W resistance can read a maximum current of 6mA.  It can be used as a voltmeter to measure a maximum of 6 V by connecting a resistance to the galvanometer.  Identify the correct choice in the given answers

(a) 1025 W in series

(b) 1025 W in parallel

(c) 975 W in series

(d) 975 W in parallel

Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 W when a potential difference of 20 V is applied between its ends

(a) 120 C 

(b) 240 C

(c) 20 C

(d) 4 C