1
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Select the 'WRONG' statement out of the following.

A
Electromagnetic waves do not require any medium for their propagation.
B
Electromagnetic waves can travel through vacuum waves speed of light
C
Material medium is necessary for propagation of electromagnetic waves.
D
Electromagnetic waves are transverse in nature.
2
MHT CET 2023 11th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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 $$3 \times 10^8 \mathrm{~m} / \mathrm{s}$$ ? $$\left(\sin 30^{\circ}=0.5, \sin 45^{\circ}=\frac{1}{\sqrt{2}}\right)$$

A
$$\frac{\sqrt{2}}{3} \times 10^8 \mathrm{~m} / \mathrm{s}$$
B
$$1.5 \times 10^8 \mathrm{~m} / \mathrm{s}$$
C
$$2.1 \times 10^8 \mathrm{~m} / \mathrm{s}$$
D
$$2.5 \times 10^8 \mathrm{~m} / \mathrm{s}$$
3
MHT CET 2023 9th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$$\mathrm{q}(\overrightarrow{\mathrm{v}} \times \overrightarrow{\mathrm{B}})$$
B
$$\mathrm{q}(\overrightarrow{\mathrm{B}} \times \overrightarrow{\mathrm{v}})$$
C
$$\mathrm{q}(\overrightarrow{\mathrm{E}} \times \overrightarrow{\mathrm{v}})$$
D
$$\overrightarrow{\mathrm{qE}}+\mathrm{q}(\overrightarrow{\mathrm{v}} \times \overrightarrow{\mathrm{B}})$$
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