NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 2025 - 2028 of 2142

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Question number: 2025

» Rotational Motion » Moment of Inertia

MCQ▾

Question

From a uniform wire, two circular loops are made (i) P of radius r and (ii) Q of radius nr. If the moment of inertia of loop Q about an axis passing through its center and perpendicular to its plane is 125 times that of P about a similar axis, the value of n is (diameter of the wire is very much smaller than r or nr)

Choices

Choice (4) Response

a.

2

b.

5

c.

6

d.

3

Question number: 2026

» Rotational Motion » Angular Momentum

MCQ▾

Question

A uniform rod of length 4L is placed with one end in contact with the horizontal and is then inclined at an angle 60 0 to the horizontal and allowed to fall without slipping at contact point. When it becomes horizontal, its angular velocity will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2027

» Rotational Motion » Rotational Kinetic Energy

MCQ▾

Question

Two disc, each having moment of inertia 5 kg m 2 about its central axis, rotating with speeds 10 rad s -1 and 20 rad s -1, are brought in contact face with their axes of the rotation coincided. The loss of kinetic energy in the process is,

Choices

Choice (4) Response

a.

125 J

b.

5 J

c.

0 J

d.

2 J

Question number: 2028

» Rotational Motion » Torque

MCQ▾

Question

A flywheel of mass 25 kg has a radius of 0.3 m. What force should be applied tangentially to the rim of the flywheel so that it acquires an angular acceleration of 4 rad s -2?

Choices

Choice (4) Response

a.

6.8 N

b.

11.2 N

c.

7.5 N

d.

2.6 N

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