NEET Physics: Questions 383 - 387 of 2098

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2098 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 383

» Laws of Motion » Impulse

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

Graph explaining force vs time graph

Graph Explaining Force vs Time Graph

In above figure we show force vs time graph, we also so that magnitude of force in both direction

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

» Electrostatics » Electric Potential

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

» Laws of Motion » Momentum

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

» Kinematics » Uniform and Non-Uniform Motion

MCQ▾

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: 387 (2 of 3 Based on Passage) Show Passage

» Laws of Motion » Force and Inertia

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, (50+50ag)kgwt

b.

50 kg wt, (50ag)kgwt

c.

50 kg wt, (50+50ga)kgwt

d.

50 kg wt, (50ga)kgwt

Sign In