In an electromagnetic wave the energy density associated with magnetic field will be
In an electromagnetic wave the energy density associated with magnetic field will be
- A
$\frac{1}{2}\,L{I^2}$
- B
$\frac{{{B^2}}}{{2{\mu _0}}}$
- C
$\frac{{1\,}}{2}{\mu _0}{B^2}$
- D
$\frac{{1\,}}{2}\frac{{{\mu _0}}}{{{B^2}}}$
Similar Questions
Consider an electromagnetic wave propagating in vacuum . Choose the correct statement
Consider an electromagnetic wave propagating in vacuum . Choose the correct statement
- [JEE MAIN 2016]
An electromagnetic wave travelling in the $x-$ direction has frequency of $2 \times 10^{14}\,Hz$ and electric field amplitude of $27\,Vm^{-1}$ . From the options given below, which one describes the magnetic field for this wave ?
An electromagnetic wave travelling in the $x-$ direction has frequency of $2 \times 10^{14}\,Hz$ and electric field amplitude of $27\,Vm^{-1}$ . From the options given below, which one describes the magnetic field for this wave ?
- [JEE MAIN 2015]
In propagation of electromagnetic waves the angle between the direction of propagation and plane of polarisation is
In propagation of electromagnetic waves the angle between the direction of propagation and plane of polarisation is
A particle of mass $M$ and positive charge $Q$, moving with a constant velocity $\overrightarrow{ u }_1=4 \hat{ i } ms ^{-1}$, enters a region of uniform static magnetic field normal to the $x-y$ plane. The region of the magnetic field extends from $x=0$ to $x$ $=L$ for all values of $y$. After passing through this region, the particle emerges on the other side after $10$ milliseconds with a velocity $\overline{ u }_2=2(\sqrt{3} \hat{ i }+\hat{ j }) ms ^{-1}$. The correct statement$(s)$ is (are) :
$(A)$ The direction of the magnetic field is $-z$ direction.
$(B)$ The direction of the magnetic field is $+z$ direction
$(C)$ The magnitude of the magnetic field $\frac{50 \pi M }{3 Q }$ units.
$(D)$ The magnitude of the magnetic field is $\frac{100 \pi M}{3 Q}$ units.
A particle of mass $M$ and positive charge $Q$, moving with a constant velocity $\overrightarrow{ u }_1=4 \hat{ i } ms ^{-1}$, enters a region of uniform static magnetic field normal to the $x-y$ plane. The region of the magnetic field extends from $x=0$ to $x$ $=L$ for all values of $y$. After passing through this region, the particle emerges on the other side after $10$ milliseconds with a velocity $\overline{ u }_2=2(\sqrt{3} \hat{ i }+\hat{ j }) ms ^{-1}$. The correct statement$(s)$ is (are) :
$(A)$ The direction of the magnetic field is $-z$ direction.
$(B)$ The direction of the magnetic field is $+z$ direction
$(C)$ The magnitude of the magnetic field $\frac{50 \pi M }{3 Q }$ units.
$(D)$ The magnitude of the magnetic field is $\frac{100 \pi M}{3 Q}$ units.
- [IIT 2013]
Give equation which relate $c,{\mu _0},{ \in _0}$.
Give equation which relate $c,{\mu _0},{ \in _0}$.