AP EAPCET 2022 - 4th July Evening Shift | Electromagnetic Waves Question 5 | Physics

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

$$-2\%$$

$$4\%$$

$$2\%$$

$$-4\%$$

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-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

$$2.9 \times 10^{-8} \mathrm{~T}$$

$$3 \times 10^{-6} \mathrm{~T}$$

$$8.7 \times 10^{-6} \mathrm{~T}$$

$$3 \times 10^{-5} \mathrm{~T}$$

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-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

$$4.4 ~\mu \mathrm{T}$$

$$6.6 ~\mu \mathrm{T}$$

$$8.8~ \mu \mathrm{T}$$

$$102 ~\mu \mathrm{T}$$

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-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

$$2.3 \times 10^{-15} \mathrm{~N}$$

$$1.33 \times 10^{-14} \mathrm{~N}$$

$$6.67 \times 10^{-15} \mathrm{~N}$$

$$9.4 \times 10^{-15} \mathrm{~N}$$

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