NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1992 - 1996 of 2184

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Question number: 1992

» Rotational Motion » Values of Moments of Inertia

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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: 1993

» Rotational Motion » Moment of Inertia

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Assertion-Reason▾

Question

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 false but Ꭱ is true

d.

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

Question number: 1994

» Gravitation » Gravitational Acceleration

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MCQ▾

Question

If the value of ‘g’ at a height h above the surface of the earth is the same as at a depth x below it, then (both x and h being much smaller than the radius of the earth)

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1995

» Gravitation » Gravitational Acceleration

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MCQ▾

Question

What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness? (g = 10 m/s 2 and radius of earth = 6400 km)

Choices

Choice (4) Response

a.

1.25 ⨯ 10 -3 rad/sec

b.

1.25 ⨯ 10 -2 rad/sec

c.

1.25 ⨯ 10 -4 rad/sec

d.

1.25 ⨯ 10 -1 rad/sec

Question number: 1996

» Gravitation » Universal Law of Gravitation

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Gravitational force between two particles is negligibly small compared to the electrical force.

Reason (Ꭱ)

The electrical force is experienced by charged particles only.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Ꭺ is true but Ꭱ is false