NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 317 - 321 of 2142

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Question number: 317

» Laws of Motion » Newton's Law » Newton's Third Law of Motion

Assertion-Reason▾

Assertion (Ꭺ)

A cloth covers a table. Some dishes are kept on it. The cloth can be pulled out without dislodging the dishes from the table.

Reason (Ꭱ)

To every action there is an equal and opposite reaction.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Ꭺ is true but Ꭱ is false

c.

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

d.

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

Question number: 318

» Laws of Motion » Momentum

MCQ▾

Question

A force of 4 N is applied on a particle for 3 sec, the change in momentum will be -

Choices

Choice (4) Response

a.

4 Ns

b.

6 Ns

c.

12 Ns

d.

3 Ns

Question number: 319

» Electrostatics » Electric Potential

MCQ▾

Question

The displacement of a charge Q in the electric field . The work done is,

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 320

» Rotational Motion » Angular Momentum

MCQ▾

Question

A thin circular ring of mass M and radius r is rotating about its axis with a constant angular velocity co. Four objects each of mass m, are kept gently to the opposite ends of two perpendicular diameters of the ring. The angular velocity of the ring will be

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 321

» Kinematics » Motion in a Plane

MCQ▾

Question

A man whirls a stone round his head on the end of a string 4.0 metre long. Can the string be in a horizontal, plane? If the stone has a mass of 0.4 kg and the string will break, if the tension in it exceeds 8 N. The smallest angle the string can make with the horizontal and the speed of the stone will respectively be (Take g = 10 m/sec 2)

Choices

Choice (4) Response

a.

45°, 8.2 m/s

b.

60°, 7.7 m/s

c.

60°, 8.7 m/s

d.

30°, 7.7 m/s

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