MCQ
In an atom, electrons revolve around the nucleus. This gives rise to:
  • A
    Only electric field.
  • B
    Only magnetic field.
  • Both electric and magnetic fields.
  • D
    None of the above.

Answer

Correct option: C.
Both electric and magnetic fields.

When a charge electron starts to move, electric current generates and this electric current generates magnetic field, a charge at rest also can generate electric field.

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

A rectangular block is composed of three different glass prisms (with refractive indices $\mu_1, \mu_2$ and $\mu_3$ ) as shown in the figure below. A ray of light incident normal to the lef $t$ face emerges normal to the right face. Then, the refractive indices are related by
A steel wire has a resistance twice that of an aluminium wire. Both of them are connected with a constant voltage supply. More heat will be dissipated in
In $YDSE$ $a=2 \,mm , D=2\, m , \lambda=500\, nm .$ Find the distance of point on screen from central maxima where intensity becomes $50 \%$ of central maxima (in $\mu m$)
Critical angle of incidence for a pair of optical media is $45^{\circ}$. The refractive indices of first and second media are in the ratio:
A student says that he had applied a force $\text{F}=-\text{k}\sqrt{\text{x}}$ on a particle and the particle moved in simple harmonic motion. He refuses to tell whether k is a constant or not. Assume that he was worked only with positive x and no other force acted on the particle.
If the net electric field at point $\mathrm{P}$ along $\mathrm{Y}$ axis is zero, then the ratio of $\left|\frac{q_2}{q_3}\right|$ is $\frac{8}{5 \sqrt{x}}$, where $\mathrm{x}=$. . . . . .
A hollow insulated conducting sphere is given a positive charge of $10\,\mu \,C$. ........$\mu \,C{m^{ - 2}}$ will be the electric field at the centre of the sphere if its radius is $2$ meters
The potential difference between the plates of a parallel plate capacitor is changing at the rate of $10^6\, V/s$. If the capacitance is $2\,\mu F$, the displacement current in the dielectric of the capacitor will be......$A$
At magnetic poles of earth, angle of dip is
The value of current through $20\,\Omega $ resistor is .................. $A$