NEET Physics: Questions 78 - 83 of 2098

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Question number: 78

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

If L = 2.331 cm, B = 2.1 cm, then L + B =

Choices

Choice (4) Response

a.

4, 43 cm

b.

4 cm

c.

4.431 cm

d.

4.4 cm

Question number: 79

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

In an experiment, the following observations were recorded: L = 2.820 m, M = 3.00 kg, l = 0.087 cm, Diameter D = 0.041 cm. Taking g = 9.81 m/s2 using the formula, Y =

4MgLπD2l

, the maximum percentage error in Y is

Choices

Choice (4) Response

a.

6.50 %

b.

4.56 %

c.

7.96 %

d.

8.42 %

Question number: 80

» Kinematics » Average Speed and Instantaneous Velocity

MCQ▾

Question

Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing is

Choices

Choice (4) Response

a.

2V√3s

b.

4s

c.

4√3s

d.

Both c. and b. are correct

Passage

The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 3500Hz is used. The first resonating length is measured as 14.6 cm and the second resonating length is measured as 24.0 cm.

Question number: 81 (1 of 2 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

Calculate the speed of sound at the room temperature

Choices

Choice (4) Response

a.

276 m/s

b.

675 m/s

c.

930 m/s

d.

658 m/s

Question number: 82 (2 of 2 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

Calculate the end correction.

Choices

Choice (4) Response

a.

9.9 cm

b.

9.2 cm

c.

9.1 cm

d.

9.4 cm

Question number: 83

» Kinematics » Motion in a Straight Line

MCQ▾

Question

The position of a particle moving in the xy-plane at any time t is given by x = (4t 2 - 8t) metres, y = (5t 2 - 10t) metres. Select the correct statement about the moving particle from the following

Choices

Choice (4) Response

a.

The velocity of the particle is zero at t = 1 second

b.

The velocity of the particle is zero at t = 0 second

c.

The acceleration of the particle is zero at t = 0 second

d.

The velocity and acceleration of the particle are never zero

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