1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

The electromagnetic radiation which has the smallest wavelength are

A
X-rays
B
Gamma rays
C
Ultraviolet rays
D
Microwaves
2
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

If the ratio of relative permeability and relative permittivity of a uniform medium is $$1: 4$$. The ratio of the magnitudes of electric field intensity $$(E)$$ to the magnetic field intensity $$(H)$$ of an EM wave propagating in that medium is (Given that $$\sqrt{\frac{\mu_0}{\varepsilon_0}}=120 \pi$$):

A
$$30 \pi: 1$$
B
$$1: 120 \pi$$
C
$$60 \pi: 1$$
D
$$120 \pi: 1$$
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1

The property which is not of an electromagnetic wave travelling in free space is that:

A
They are transverse in nature
B
The energy density in electric field is equal to energy density in magnetic field
C
They travel with a speed equal to $$\frac{1}{\sqrt{\mu_0 \varepsilon_0}}$$
D
They originate from charges moving with uniform speed
4
NEET 2023
MCQ (Single Correct Answer)
+4
-1

In a plane electromagnetic wave travelling in free space, the electric field component oscillates sinusoidally at a frequency of $$2.0 \times 10^{10} \mathrm{~Hz}$$ and amplitude $$48 ~\mathrm{Vm}^{-1}$$. Then the amplitude of oscillating magnetic field is : (Speed of light in free space $$=3 \times 10^{8} \mathrm{~m} \mathrm{~s}^{-1}$$ )

A
$$1.6 \times 10^{-8} \mathrm{~T}$$
B
$$1.6 \times 10^{-7} \mathrm{~T}$$
C
$$1.6 \times 10^{-6} \mathrm{~T}$$
D
$$1.6 \times 10^{-9} \mathrm{~T}$$
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