1
KCET 2023
+1
-0

The ratio of the magnitudes of electric field to the magnetic field of an electromagnetic wave is of the order of

A
10$$^{-8}$$ ms$$^{-1}$$
B
10$$^{5}$$ ms$$^{-1}$$
C
10$$^{-5}$$ ms$$^{-1}$$
D
10$$^{8}$$ ms$$^{-1}$$
2
KCET 2022
+1
-0

Which of the following radiations of electromagnetic waves has the highest wavelength ?

A
UV-rays
B
IR-rays
C
Microwaves
D
X-rays
3
KCET 2021
+1
-0

Suppose that the electric field amplitude of electromagnetic wave is $$E_0=120 \mathrm{~NC}^{-1}$$ and its frequency $$f=50 \mathrm{~MHz}$$. Then, which of the following value is incorrectly computed?

A
Magnetic field amplitude is $$400 \mathrm{nT}$$.
B
Angular frequency of EM wave is $$\pi \times 10^8 \mathrm{rad} / \mathrm{s}$$.
C
Propagation constant (angular wave number) is $$2.1 \mathrm{~rad} / \mathrm{m}$$.
D
Wavelength of EM wave is $$6 \mathrm{~m}$$.
4
KCET 2021
+1
-0

The source of electromagnetic wave can be a charge

A
moving with a constant velocity
B
moving in a circular orbit
C
at rest
D
moving parallel to the magnetic field
EXAM MAP
Medical
NEET