Electromagnetic...

Choose the correct answer from the alternatives given.
Assume a bulb of efficiency 2.5% as a point source. The peak values of electric and magnetic fields produced by the radiation coming from a 100 W bulb at a distance of 3 m is respectively 

A plane EM wave travelling alone z-direction is described by $${ \overrightarrow { E } \  =\  { E }_{ 0 } }\sin { (kz\  -\  \omega t)\hat{ i } }$$ and $${\vec B\  =\  { B }_{ 0 } }\sin { (kz\  -\  \omega t)\hat{ j } }$$.

Suppose that the electric field amplitude of an electromagnetic wave propagating along x-direction is $${ E }_{ 0}$$ = 120 N $${ C }^{ -1 }$$ and that its frequency is $$\upsilon$$ = 50.0 MHz.

A plane e.m wave of frequency $$30MHz$$ travels in free space along the x-direction. The electric field component of the wave at a particular point of space and time $$E=6V/m$$ along $$y$$-direction. Its magnetic field component $$B$$ at this point would be

$$E=3.1\cos { \left[ \left( 1.8\dfrac { rad }{ m }  \right) y+\left( 5.4\times { 10 }^{ 8 }\dfrac { rad }{ s }  \right) t \right] \hat { i }  } $$.The frequency corresponding to the given part of the electromagnetic wave is?

In an electromagnetic wave, the amplitude of electric and magnetizing fields are 100 V/m and 0.265 A/m/ The maximum energy flow is -

Potential difference across plates of a capacitor $$6\mu F$$ is changing at the rate of $$72V{ s }^{ -1 }$$. Displacement current at that instant will be 

A plane electromagnetic wave with an intensity of $$200 W/m^2$$ is incident normal to a flat plate of radius 30 cm. If the plate absorbs $$60\%$$ and reflects $$40\%$$ of the incident radiation, what is the momentum transferred to it in 5 min?

The magnetic field in a plane electromagnetic wave is given by$$B=2.01\times10^{-7} \sin(6.28\times10^2x+2.2\times10^{10}t)T$$. [where x in cm and t in second]. The wavelength of the given wave is 

A parallel late condenser consists of two circular plate each of radius $$2cm$$ separated by a distance of $$0.1mm$$. A time varying potential difference of $$5\times 10^{13}v/s$$ is applied across the plated of the condenser: The displacement current is