1
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two positively charged identical spheres separated by a distance 'd' exert some force (F) on each other when they are kept in air. If both the spheres are immersed in a liquid of dielectric constant 5 , the force experienced by each is (All other parameters are unchanged.)

A
$$5 \mathrm{~F}$$
B
$$\frac{F}{3}$$
C
$$\frac{F}{4}$$
D
$$\frac{F}{5}$$
2
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A string fixed at both the ends forms standing wave with node separation of $$5 \mathrm{~cm}$$. If the velocity of the wave on the string is $$2 \mathrm{~m} / \mathrm{s}$$, then the frequency of vibration of the string is

A
0.2 Hz
B
10 Hz
C
20 Hz
D
40 Hz
3
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A ball of mass '$$\mathrm{m}$$' is attached to the free end of a string of length '$$l$$'. The ball is moving in horizontal circular path about the vertical axis as shown in the diagram.

The angular velocity '$$\omega$$' of the ball will be [ $$\mathrm{T}=$$ Tension in the string.]

MHT CET 2023 11th May Morning Shift Physics - Circular Motion Question 23 English

A
$$\sqrt{\frac{\mathrm{T} l}{\mathrm{~m}}}$$
B
$$\sqrt{\frac{\mathrm{Tm}}{l}}$$
C
$$\sqrt{\frac{\mathrm{m} l}{\mathrm{~T}}}$$
D
$$\sqrt{\frac{\mathrm{T}}{\mathrm{ml} l}}$$
4
MHT CET 2023 11th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Radius of gyration of a thin uniform circular disc about the axis passing through its centre and perpendicular to its plane is $$\mathrm{K}_{\mathrm{c}}$$. Radius of gyration of the same disc about a diameter of the disc is $$K_d$$. The ratio $$K_c: K_d$$ is

A
$$\sqrt{2}: 1$$
B
$$1: \sqrt{2}$$
C
$$2: 1$$
D
$$1: 4$$
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