MHT CET 2023 13th May Morning Shift | Electromagnetic Waves Question 1 | Physics

An electromagnetic wave, whose wave normal makes an angle of $$45^{\circ}$$ with the vertical, travelling in air strikes a horizontal liquid surface. While travelling through the liquid it gets deviated through $$15^{\circ}$$. What is the speed of the electromagnetic wave in the liquid, if the speed of electromagnetic wave in air is $$3 \times 10^8 \mathrm{~m} / \mathrm{s}$$ ? $$\left(\sin 30^{\circ}=0.5, \sin 45^{\circ}=\frac{1}{\sqrt{2}}\right)$$

$$\frac{\sqrt{2}}{3} \times 10^8 \mathrm{~m} / \mathrm{s}$$

$$1.5 \times 10^8 \mathrm{~m} / \mathrm{s}$$

$$2.1 \times 10^8 \mathrm{~m} / \mathrm{s}$$

$$2.5 \times 10^8 \mathrm{~m} / \mathrm{s}$$

MHT CET 2023 9th May Evening Shift

MCQ (Single Correct Answer)

-0

A charge '$$q$$' moves with velocity '$$v$$' through electric (E) as well as magnetic field (B). Then the force acting on it is

$$\mathrm{q}(\overrightarrow{\mathrm{v}} \times \overrightarrow{\mathrm{B}})$$

$$\mathrm{q}(\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{v}})$$

$$\mathrm{q}(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{v}})$$

$$\overrightarrow{\mathrm{qE}}+\mathrm{q}(\overrightarrow{\mathrm{v}} \times \overrightarrow{\mathrm{B}})$$

MHT CET 2020 16th October Morning Shift

MCQ (Single Correct Answer)

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In amplitude modulation,

amplitude remains constant but frequency . changes according to information signal

amplitude of carrier wave changes according to information signal

both amplitude and frequency changes according to information signal

both amplitude and frequency do not change according to information signal

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