MHT CET 2021 21th September Morning Shift | MHT CET Year Wise Previous Years Questions

In fundamental mode, the time required for the sound wave to reach upto the closed end of pipe filled with air is $$t$$ second. The frequency of vibration of air column is

$$\frac{1}{t}$$

$$\frac{2}{t}$$

$$\frac{3}{t}$$

$$\frac{0.25}{\mathrm{t}}$$

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

A particle of mass '$$m$$' is kept at rest at a height $$3 R$$ from the surface of earth, where '$$R$$' is radius of earth and '$$M$$' is the mass of earth. The minimum speed with which it should be projected, so that it does not return back is ( $$g=$$ acceleration due to gravity on the earth's surface)

$$\left[\frac{\mathrm{GM}}{2 \mathrm{R}}\right]^{1 / 2}$$

$$\left[\frac{\mathrm{gR}}{4}\right]^{1 / 2}$$

$$\left[\frac{2 \mathrm{~g}}{\mathrm{R}}\right]^{1 / 2}$$

$$\left[\frac{\mathrm{GM}}{\mathrm{R}}\right]^{1 / 2}$$

MHT CET 2021 21th September Morning Shift

MCQ (Single Correct Answer)

-0

'$$\mathrm{F}$$' is the force between the two identical charged particles placed at a distance '$$\mathrm{Y}$$' from each other. If the distance between the charges is reduced to half the previous distance then force between them becomes

$$\frac{F}{4}$$

$$4 \mathrm{~F}$$

$$2 \mathrm{~F}$$

$$\frac{\mathrm{F}}{2}$$

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