NEET Physics Electromagnetic Waves MCQs

A monochromatic electromagnetic wave propagates in vacuum. If its electric field amplitude is $E_0$ and magnetic field amplitude is $B_0$, which of the following relations is NOT correct?

A charged particle moves with a velocity $v$ in a region where both electric field $E$ and magnetic field $B$ are present. The particle experiences no net force. Which of the following conditions must be true?

A charged particle enters a region with crossed electric and magnetic fields such that it continues undeflected. If the magnitude of the electric field is $E$ and the magnetic field is $B$, and the particle's velocity is $v$, which of the following changes would necessitate an increase in $E$ to maintain the undeflected trajectory, assuming all other parameters remain constant?

A parallel plate capacitor has a uniform electric field E between the plates. A uniform magnetic field B is applied perpendicular to E. An electron is projected into this region with velocity v such that it passes through undeflected. If the plate separation is d, the potential difference between the plates is:

In a uniform magnetic field of ${10^{ - 5}}T$ in free space, the energy density is u. The electric field which will produce the same energy density in free space is

An electromagnetic wave of frequency $1{\rm{ }} imes {\rm{ }}{10^{14}}Hz$ is propagating along z-axis. The amplitude of the electric field is 4 V/m. If {\varepsilon _{0\;}} = {\rm{ }}8.8{\rm{ }} imes {\rm{ }}10{\;^{ - 12}}{C^2}\;/{\rm{ }}N - {m^2}, then the average energy density of electric field will be :

A circular ring of radius $r$ is placed in a homogenous magnetic field perpendicular to the plane of the ring. The field $B$ chnages with time according to the equation $B = kt$, where $k$ is a constant and $t$ is the time. The electric field in the ring is

The relation between electric field vector ${\bf{E}}$, the displacement vector ${\bf{D}}$ and the polarization vector ${\bf{P}}$ for a dielectric placed in electric field ${\bf{E}}$ is given by

Electromagnetic Waves can be deflected by

The amplitude of electric field in a parallel beam of light of intensity $4{\rm{\;W}}{{\rm{m}}^{ - 2}}$ is