1
AP EAPCET 2022 - 4th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

A carrier wave is used to transmit a message signal. If the peak voltage of modulating signal and carrier signal are increased by $$1 \%$$ and $$3 \%$$ respectively, the modulation index is changed by

A
$$-2\%$$
B
$$4\%$$
C
$$2\%$$
D
$$-4\%$$
2
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A plane electromagnetic wave travels in free space along $$Z$$-axis. At a particular point in space, the electric field along $$X$$-axis is $$8.7 \mathrm{~Vm}^{-1}$$. The magnetic field along $$Y$$-axis is

A
$$2.9 \times 10^{-8} \mathrm{~T}$$
B
$$3 \times 10^{-6} \mathrm{~T}$$
C
$$8.7 \times 10^{-6} \mathrm{~T}$$
D
$$3 \times 10^{-5} \mathrm{~T}$$
3
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the average power per unit area delivered by an electromagnetic wave is $$9240 \mathrm{~Wm}^{-2}$$. then the amplitude of the oscillating magnetic field in EM wave is

A
$$4.4 ~\mu \mathrm{T}$$
B
$$6.6 ~\mu \mathrm{T}$$
C
$$8.8~ \mu \mathrm{T}$$
D
$$102 ~\mu \mathrm{T}$$
4
AP EAPCET 2022 - 4th July Morning Shift
MCQ (Single Correct Answer)
+1
-0

A beam of light with intensity $$10^{-3} \mathrm{~Nm}^{-2}$$ and cross-sectional area $$20 \mathrm{~cm}^2$$ is incident on a fully reflective surface at angle $$45^{\circ}$$. Then, the force exerted by the beam on the surface is

A
$$2.3 \times 10^{-15} \mathrm{~N}$$
B
$$1.33 \times 10^{-14} \mathrm{~N}$$
C
$$6.67 \times 10^{-15} \mathrm{~N}$$
D
$$9.4 \times 10^{-15} \mathrm{~N}$$
AP EAPCET Subjects
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