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1
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
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
A
$1.75 \times 10^{-6} \mathrm{Jm}^{-3}$
B
$2.75 \times 10^{-6} \mathrm{Jm}^{-3}$
C
$4.85 \times 10^{-6} \mathrm{Jm}^{-3}$
D
$3.85 \times 10^{-6} \mathrm{Jm}^{-3}$
2
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-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
A
$10^{37}$
B
$10^{31}$
C
$10^{25}$
D
$10^{43}$
3
AP EAPCET 2024 - 21th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
Which of the following produces electromagnetic waves?
A
Stationary charges
B
Charges in uniform motion
C
Accelerating charges
D
Stationary magnet
4
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The average value of electric energy density in an electromagnetic wave is where $E_0$ is peak value
A
$\frac{E_0 E_{\pi m}^2}{4}$
B
$\frac{1}{2} \varepsilon_0 E_0^2$
C
$\frac{1}{2} e_0 E_0$
D
$\frac{1}{4} \varepsilon_0 E_0^2$
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