NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 30 - 35 of 2184

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Passage

The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 2000 Hz is used. The first resonating length is measured as 4.6 cm and the second resonating length is measured as 14.0 cm.

Question number: 30 (3 of 3 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

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MCQ▾

Question

Calculate the speed of sound at the room temperature.

Choices

Choice (4) Response

a.

376 m/s

b.

275 m/s

c.

330 m/s

d.

356 m/s

Question number: 31

» Kinematics » Motion in a Straight Line

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Question

the acceleration of a particle is increasing linearly with time t as bt. The particle starts from the origin with an initial velocity v0. The distance travelled by the particle in time t will be

Choices

Choice (4) Response

a.

v 0 t + bt 2

b.

v 0 t + bt 2

c.

v 0 t + bt 3

d.

v 0 t + 1 3 bt 3

Question number: 32

» Kinematics » Motion in a Straight Line

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Question

If the displacement of a particle is (5t 2 + 2t + 5) meter then, what will be ace. at t = 5 second?

Choices

Choice (4) Response

a.

20 m/s 2

b.

4 m/s 2

c.

21 m/s 2

d.

1 0 m/s 2

Question number: 33

» Kinematics » Motion in a Straight Line

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Question

If the displacement of a particle is (2t 2 + t + 5) meter then, what will be ace. at t = 5 second?

Choices

Choice (4) Response

a.

21 m/s 2

b.

10 m/s 2

c.

20 m/s 2

d.

4 m/s 2

Question number: 34

» Kinematics » Motion in a Straight Line

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Question

the displacement x of a particle varies with time t, x = a + b , where a, b, α and β are positive constants.

The velocity of the particle will

Choices

Choice (4) Response

a.

Be independent of α and β

b.

Drop to zero when α = β

c.

Go on decreasing with time

d.

Go on increasing with time

Question number: 35

» Kinematics » Motion in a Straight Line

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Two cars A and B are travelling in the same direction with velocities V 1 and v 2 (v 1 > v 2). When the car A is at a distance d ahead of the car B, the driver of the car A applied the brake producing a uniform retardation a. There will be no collision when

Choices

Choice (4) Response

a.

d

b.

d

c.

d

d.

d