1
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

In Young's double slit experiment using monochromatic light of wavelength '$$\lambda$$', the maximum intensity of light at a point on the screen is $$\mathrm{K}$$ units. The intensity of light at point where the path difference is $$\frac{\lambda}{3}$$ is

$$\left[\cos 60^{\circ}=\sin 30^{\circ}=\frac{1}{2}\right]$$

A
$$\frac{K}{4}$$
B
$$\frac{3 K}{4}$$
C
K
D
$$\frac{\mathrm{K}}{2}$$
2
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

An electron of mass '$$m$$' and charge '$$q$$' is accelerated from rest in a uniform electric field of strength '$$E$$'. The velocity acquired by the electron when it travels a distance '$$L$$' is

A
$$\sqrt{\frac{2 \mathrm{qE}}{\mathrm{mL}}}$$
B
$$\sqrt{\frac{2 \mathrm{Em}}{\mathrm{qL}}}$$
C
$$\sqrt{\frac{2 \mathrm{qEL}}{\mathrm{m}}}$$
D
$$\times \sqrt{\frac{\mathrm{qE}}{\mathrm{mL}}}$$
3
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the terminal speed of a sphere A [density $$\rho_{\mathrm{A}}=7.5 \mathrm{~kg} \mathrm{~m}^{-3}$$ ] is $$0.4 \mathrm{~ms}^{-1}$$, in a viscous liquid [density $$\rho_{\mathrm{L}}=1.5 \mathrm{~kg} \mathrm{~m}^{-3}$$ ], the terminal speed of sphere B [density $$\rho_B=3 \mathrm{~kg} \mathrm{~m}^{-3}$$ ] of the same size in the same liquid is

A
$$0.3 \mathrm{~ms}^{-1}$$
B
$$0.1 \mathrm{~ms}^{-1}$$
C
$$0.2 \mathrm{~ms}^{-1}$$
D
$$0.4 \mathrm{~ms}^{-1}$$
4
MHT CET 2021 22th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

A particle connected to the end of a spring executes S.H.M. with period '$$T_1$$'. While the corresponding period for another spring is '$$\mathrm{T}_2$$'. If the period of oscillation with two springs in series is 'T', then

A
$$\mathrm{T}=\sqrt{\mathrm{T}_1^2+\mathrm{T}_2^2}$$
B
$$\mathrm{T}=\sqrt{\mathrm{T}_2^2-\mathrm{T}_1^2}$$
C
$$\mathrm{T=T_1+T_2}$$
D
$$\mathrm{T}=\mathrm{T}_1-\mathrm{T}_2$$
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