NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 385 - 389 of 2320

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Question number: 385

» Electrostatics » Electric Potential

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MCQ▾

Question

The distance between H + and CI - ions in HCl molecule is 1.28. What will be the potential due to this dipole at a distance of 12 on the axis of dipole?

Choices

Choice (4)Response

a.

13 V

b.

130 V

c.

1.3 V

d.

0.13 V

Question number: 386

» Laws of Motion » Momentum

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MCQ▾

Question

A boat of mass 100 kg is moving with a velocity of 5 m/s. A person of mass 50 kg jumps into the boat. The velocity of the boat with the person will be –

Choices

Choice (4)Response

a.

3.71 cm/s

b.

3.33 m/s

c.

4.48 m/s

d.

7.1 cm/s

Passage

Pseudo force is an imaginary force which is recognized only by a non-inertial observer to explain the physical situation according to newton’s laws. Magnitude of pseudo force F is equal to the product of the mass m of the object and the acceleration a of the frame of reference. The direction of the force is opposite to the direction of acceleration, F =-ma

Question number: 387 (1 of 3 Based on Passage) Show Passage

» Laws of Motion » Force and Inertia

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Question

A spring weighing machine inside a stationary lift reads 50 kg when a man stand on it. What would happen to the scale reading if the lift is moving upward with (i) constant velocity (ii) constant acceleration?

Choices

Choice (4)Response

a.

50 kg wt,

b.

50 kg wt,

c.

50 kg wt,

d.

50 kg wt,

Question number: 388 (2 of 3 Based on Passage) Show Passage

» Kinematics » Uniform and Non-Uniform Motion

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Question

A body is suspended by a string from the ceiling of an elevator. It is observed that the tension in the string is doubled when the elevator is accelerated. The acceleration will be -

Choices

Choice (4)Response

a.

9.8 m/s 2

b.

4.9 m/s 2

c.

2.45 m/s 2

d.

19.6 m/s 2

Question number: 389 (3 of 3 Based on Passage) Show Passage

» Kinematics » Uniform and Non-Uniform Motion

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MCQ▾

Question

A 25 kg lift is supported by a cable. The acceleration of the lift when the tension in the cable is 175 N, will be –

Choices

Choice (4)Response

a.

16.8 m/s 2

b.

14 m/s 2

c.

2.8 m/s 2

d.

- 9.8 m/s 2

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