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

Light of frequency 1.5 times the threshold frequency is incident on photosensitive material. If the frequency is halved and intensity is doubled, the photocurrent becomes

A
quadrupled
B
double
C
half
D
zero
2
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A solid cylinder of mass $$3 \mathrm{~kg}$$ is rolling on a horizontal surface with velocity $$4 \mathrm{~m} / \mathrm{s}$$. It collides with a horizontal spring whose one end is fixed to rigid support. The force constant of material of spring is $$200 \mathrm{~N} / \mathrm{m}$$. The maximum compression produced in the spring will be (assume collision between cylinder & spring be elastic)

A
0.7 m
B
0.2 m
C
0.5 m
D
0.6 m
3
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which one of the following statements is Wrong?

A
A body can have zero velocity and still be accelerated.
B
A body can have a constant velocity and still have a varying speed.
C
A body can have a constant speed and still have a varying velocity.
D
The direction of the velocity of a body can change when its acceleration is constant.
4
MHT CET 2023 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The fundamental frequency of a sonometer wir carrying a block of mass '$$M$$' and density '$$\rho$$' is '$$n$$' Hz. When the block is completely immerse in a liquid of density '$$\sigma$$' then the new frequency will be

A
$$\mathrm{n}\left[\frac{\rho-\sigma}{\rho}\right]^{\frac{1}{2}}$$
B
$$\mathrm{n}\left[\frac{\rho-\sigma}{\sigma}\right]^{\frac{1}{2}}$$
C
$$\mathrm{n}\left[\frac{\rho}{\rho-\sigma}\right]^{\frac{1}{2}}$$
D
$$n\left[\frac{\sigma}{\rho-\sigma}\right]^{\frac{1}{2}}$$
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