New chat PYQ Library Doubts Rank report

Sign in to see Recents

Sign in to save progress →

Electromagnetic Waves question

2021 · 25 Feb · Shift 2 · Q71

Guest · try one question or challengeGuest · try one question or challenge

PYQ Library
JEE Main
Physics
Electromagnetic Waves
2021 · 25 Feb · Shift 2 · Q71

Electromagnetic Waves question

2021 · 25 Feb · Shift 2 · Q71

JEE MainPhysicsElectromagnetic WavesNumerical+4 / −1

The peak electric field produced by the radiation coming from the 8W bulb at a distance of 10 m is

{x \over {10}}\sqrt {{{{\mu _0}c} \over \pi }} {V \over m}

. The efficiency of the bulb is 10% and it is a point source. The value of x is

\underline{\hspace{2cm}}

.

Numerical answer

More from Electromagnetic Waves

The wavelength of an X-ray beam is 10 $A o$ . The mass of a fictitious particle having the same energy as that of the X-ray photons is $\frac{x}{3} h$ kg. The value of x is . (h = Planck's constant)2021 · Numerical
A linearly polarized electromagnetic wave in vacuum is $E = 3.1 cos [(1.8) z - (5.4 \times 10^{6}) t] i N / C$ is incident normally on a perfectly reflecting wall at z = a. Choose the correct option2021 · MCQ
The electric field in a plane electromagnetic wave is given by $E = 200 cos [(\frac{0.5 \times 10 ^{3}}{m}) x - (1.5 \times 10^{11} \frac{r a d}{s} \times t)] \frac{V}{m} j$ …2021 · Numerical
A light beam is described by $E = 800 sin ω (t - \frac{x}{c})$ . An electron is allowed to move normal to the propagation of light beam with a speed of 3 $\times$ 107 ms $-$ 1. What is the maximum magnetic force…2021 · MCQ
A radiation is emitted by 1000W bulb and it generates an electric field and magnetic field at P, placed at a distance of 2m. The efficiency of the bulb is 1.25%. The value of peak electric field at P is x $\times$ 10 $-$ 1 V/m. Value of x…2021 · Numerical
Electric field in a plane electromagnetic wave is given by E = 50 sin(500x $-$ 10 $\times$ 1010 t) V/m The velocity of electromagnetic wave in this medium is : (Given C = speed of light in vacuum)2021 · MCQ
A plane electromagnetic wave with frequency of 30 MHz travels in free space. At particular point in space and time, electric field is 6 V/m. The magnetic field at this point will be x $\times$ 10 $-$ 8 T. The value of x is …2021 · Numerical
The relative permittivity of distilled water is 81. The velocity of light in it will be : (Given $μ$ r = 1)2021 · MCQ