1
NEET 2023
+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
$$1.6 \times 10^{-9} \mathrm{~T}$$
2
NEET 2022 Phase 2
+4
-1

The magnetic field of a plane electromagnetic wave is given by $$\overrightarrow B = 3 \times {10^{ - 8}}\cos (1.6 \times {10^3}x + 48 \times {10^{10}}t)\widehat j$$, then the associated electric field will be :

A
$$9\cos (1.6 \times {10^3}x + 48 \times {10^{10}}t)\widehat k$$ V/m
B
$$3 \times {10^{ - 8}}\cos (1.6 \times {10^3}x + 48 \times {10^{10}}t)\widehat i$$ V/m
C
$$3 \times {10^{ - 8}}\sin (1.6 \times {10^3}x + 48 \times {10^{10}}t)\widehat i$$ V/m
D
$$9\sin (1.6 \times {10^3}x - 48 \times {10^{10}}t)\widehat k$$ V/m
3
NEET 2022 Phase 2
+4
-1

The ratio of the magnitude of the magnetic field and electric field intensity of a plane electromagnetic wave in free space of permeability $${\mu _0}$$ and permittivity $${\varepsilon _0}$$ is (Given that c - velocity) of light in free space

A
$${{\sqrt {{\mu _0}{\varepsilon _0}} } \over c}$$
B
c
C
$${1 \over c}$$
D
$${c \over {\sqrt {{\mu _0}{\varepsilon _0}} }}$$
4
NEET 2022 Phase 1
+4
-1

Match List - I with List - II

List - I
(Electromagnetic waves)
List - II
(Wavelength)
(a) AM radio waves (i) $${10^{ - 10}}$$ m
(b) Microwaves (ii) $${10^2}$$ m
(c) Infrared radiations (iii) $${10^{ - 2}}$$ m
(d) X-rays (iv) $${10^{ - 4}}$$ m

Choose the correct answer from the options given below

A
(a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
B
(a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
C
(a) - (iii), (b) - (iv), (c) - (ii), (d) - (i)
D
(a) - (ii), (b) - (iii), (c) - (iv), (d) - (i)
NEET Subjects
Physics
Mechanics
Electricity
Optics
Modern Physics
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