NEET Physics: Questions 382 - 386 of 2142

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Question number: 382

MCQ▾

Question

A boat of mass 1000 kg is moving with a velocity of 5 m/s. A person of mass 60 kg jumps into the boat. The velocity of the boat with the person will be –

Choices

Choice (4) Response

a.

4.71 cm/s

b.

47.1 m/s

c.

4.71 m/s

d.

47.1 cm/s

Question number: 383

MCQ▾

Question

The magnitude of the force (in newton) acting on a body varies with time t (in microsecond) as shown in fig. AB, BC, and CD are straight line segments. The magnitude of the total impulse of the force on the body from t = 4 us to t = 16 us is

Choices

Choice (4) Response

a.

5 10 -5 N. s

b.

5 10 -4 N. s

c.

5 10 -2 N. s

d.

5 10 -3 N. s

Question number: 384

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: 385

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.

7.1 cm/s

b.

3.33 m/s

c.

3.71 cm/s

d.

4.48 m/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: 386 (1 of 3 Based on Passage) Show Passage

MCQ▾

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,

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