1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

The magnetic field in a electromagnetic wave is given by

$$B_y=2 \times 10^{-7} \sin \left(0.5+10^3 x+1.5 \times 10^{11} t\right) \mathrm{T}$$

The frequency of the wave is (in GHz)

A
1.26 GHz
B
2.39 GHz
C
12.6 GHz
D
23.9 GHz
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

An electromagnetic wave with poynting vector $6 \mathrm{Wm}^{-2}$ is absorbed by a surface area $12 \mathrm{~m}^2$. The force on the surface is

A
$24 \times 10^{-8} \mathrm{~N}$
B
$30 \times 10^{-5} \mathrm{M}$
C
$2.4 \times 10^{-12} \mathrm{~N}$
D
$3.6 \times 10^8 \mathrm{M}$
3
VITEEE 2021
MCQ (Single Correct Answer)
+1
-0

Which component of electromagnetic spectrum have maximum wavelength?

A
Radio waves
B
Visible spectrum
C
Gamma rays
D
X-rays
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