A mercury lamp is radiating monochromatic light of power 10W.The peak value of electric field strength at a distance of 5m from the lamp is nearly

A lamp radiates power P_(0) uniformly in all directions, the amplitude of elctric field strength E_(0) at a distance r from it is

A point source of electromagnetic radiation has an average power output of 800W . The maximum value of electric field at a distance 3.5m from the source will be 62.6 V/m , the energy density at a distance 3.5 m from the source will be- (in "joule"//m^(3) )

A point source of electromagnetic radiation has an average power output of 800 W . The maximum value of elecvtric field at a distance 4.0 m from the source is

A point source of electromagnetic radiation has an average power output of 800W. The mximum value of electric field at a distance 3.5 m from the source will be 62.6 V/m, the maximum value of magnetic field will be -

A point source of electromagnetic radiation has an average power output of1500W. The maximum value of electric field at a distance 3m from this source in Vm^-1 is

A point source of electromagnetic radiation has an average power output of 800W. (a) Find the maximum value of electric field at a distance 3.5 m from the source. (b) What will be the maximum value of magnetic field? (c) What will be the energy density at a distance at a distance 3.5m from the source?

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT . The peak value of electric field strength is :

A lamp emits monochromatic green light uniformly in all directions. The lamp is 3% efficient in converting electrical power to electromagnetic waves and consumes 100 W of power. The amplitude of the electric field associated with the electromagnetic radiation at a distance of 5 m from the lamp will be:

The magnetic field in a travelling electromagnetic wave has a peak value of 20 nT. The peak value of electric field strength (in volt m^(-1) ) is

A point source of electromagnetic radiation has average power output of 800 watt, then find (a) Maximum value of electric field at a distance 3.5 m from the source (b) Maximum value of magnetic field (c) Average energy density at 3.5 m from the source.