AP EAPCET 2024 - 21th May Evening Shift | Electromagnetic Waves Question 5 | Physics

The rms value of the electric field of an electromagnetic wave emitted by a source is $660 \mathrm{NC}^{-1}$. The average energy density of the electromagnetic wave is

$1.75 \times 10^{-6} \mathrm{Jm}^{-3}$

$2.75 \times 10^{-6} \mathrm{Jm}^{-3}$

$4.85 \times 10^{-6} \mathrm{Jm}^{-3}$

$3.85 \times 10^{-6} \mathrm{Jm}^{-3}$

AP EAPCET 2024 - 21th May Evening Shift

MCQ (Single Correct Answer)

-0

A transmitter of power 10 kW emits radio waves of wavelength 500 m . The number of photons emitted por second by the transmitter of the order of

$10^{37}$

$10^{31}$

$10^{25}$

$10^{43}$

AP EAPCET 2024 - 21th May Morning Shift

MCQ (Single Correct Answer)

-0

Which of the following produces electromagnetic waves?

Stationary charges

Charges in uniform motion

Accelerating charges

Stationary magnet

AP EAPCET 2024 - 20th May Morning Shift

MCQ (Single Correct Answer)

-0

The average value of electric energy density in an electromagnetic wave is where $E_0$ is peak value

$\frac{E_0 E_{\pi m}^2}{4}$

$\frac{1}{2} \varepsilon_0 E_0^2$

$\frac{1}{2} e_0 E_0$

$\frac{1}{4} \varepsilon_0 E_0^2$

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