The electric field intensity produced by the radiations coming from $$100$$ W bulb at a $$3$$ m distance is E. The electric field intensity produced by the radiations coming from $$50$$ W bulb at the same distance is

Question

Infinity Learn · Accepted Answer

Intensity of electromagnetic $$waveI=12$$∈$$0E02C$$ $$-------(1)Here$$ $$E0$$ $$=$$ Amplitude of electric field intensity. If ‘P’ is power of source, intensity of electromagnetic radiation at a distance ‘r’from source $$isI=P4$$$$π$$$$r2---(2)$$ ; From (1) and $$(2)12$$∈$$0E02C=P4$$$$π$$$$r2$$⇒P∝$$E02$$ ; $$E0$$∝P $$P2P1=E2E1$$ ;  $$P2P1=E2E1$$ $$50100=12=E2E1$$ ⇒$$E2=E12=E2$$

The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material