NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 1990 - 1992 of 2142

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Question number: 1990

» Rotational Motion » Moment of Inertia

MCQ▾

Question

The moment of inertia of a thin square plate ABCD of uniform thickness about an axis passing through the centre O and perpendicular to the plane of the plate is

Square ABCD of uniform thickness

Square ABCD of Uniform Thickness

In above figure we shows thin square plate ABCD of uniform thickness

(1) Equation

(2) Equation

(3) Equation

(4) Equation

where I 1, I 2, I 3 are respectively moments of inertia about axes 1, 2, 3 and 4 which are in the plane of the plate.

Select the correct answers and mark it according to the following codes:

Choices

Choice (4) Response

a.

1, 2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 1991

» Rotational Motion » Values of Moments of Inertia

MCQ▾

Question

A constant torque of 62.8 N-m is exerted on a pivoted wheel. If angular acceleration of wheel is rad/sec 2, then the moment of inertia of the wheel is

Choices

Choice (4) Response

a.

3 kg-m 2

b.

3.5 kg-m 2

c.

4 kg-m 2

d.

4.5 kg-m 2

Question number: 1992

» Rotational Motion » Moment of Inertia

Assertion-Reason▾

Assertion (Ꭺ)

If earth shrink (without change in mass) to half of its present size, length of the day would become 6 % increase.

Reason (Ꭱ)

When the size of the earth will change, its moment of inertia will also change.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

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