Question
An electromagnetic wave can be produced when the charge is
✓
Answer
- Both (a) and (c)
An accelerated charge is the source of electromagnetic waves (EMWs). When the charge is in a circular motion, the direction of its velocity continuously changes and thus it is in accelerated motion and produces EMWs. A charge falling in an electric field is accelerated by the electric force and thus produces EMWs.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In an electromagnetic wave, the electric and magnetising fields are $100 \mathrm{Vm}^{-1}$ and $0.265 \mathrm{Am}^{-1}$ The maximum energy flow is
→On cutting a solenoid in half, the field lines remain ...A... emerging from one face of the solenoid and entering into the other face.
Here, A refers to.
Here, A refers to.
A battery of $e.m.f. 10 V$ is connected to resistance as shown in figure. The potential difference $V_A-V_B$ between the points $A$ and $B$ is
→$\int\frac{\text{dx}}{\sqrt{2\text{ax}-\text{x}^2}}=\text{a}^{\text{n}}\sin^{-1}\Big[\frac{\text{x}}{\text{a}}-1\Big].$ The value of $n$ is$:$
→An electron, a proton, a deuteron and an alpha particle, each having the same speed are in a region of constant magnetic field perpendicular to the direction of the velocities of the particles. The radius of the circular orbits of these particles are respectively $R_e, R_p, R_d$ and $R_\alpha$. It follows that
→Which statement is correct for a zone plate and a lens (a) Zone plate has multi focii whereas lens has one(b) Zone plate has one focus whereas lens has multiple focii(c) Both are correct(d) Zone plate has one focus whereas a lens has infinite
Two capacitors whose capacitances are $C _1$ and $C _2$ If they are given equal charges then the ratio of the energies stored in them will be :
→Two points A and B are situated at a distance x and 2x respectively from the nearer pole of a magnet 2cm long. The ratio of magnetic field at A and B is:
On the bombardment of neutron with Boron. $\alpha-$particle is emitted and product nuclei formed is
→A current carrying loop is free to turn in a uniform magnetic field. The loop will then come into equilibrium when its plane is inclined at(a) 0° to the direction of the field(b) 45 ° to the direction of the field(c) 90° to the direction of the field(d) 135° to the direction of the field