NEET Physics: Questions 102 - 106 of 2098

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Question number: 102

» Kinematics » Motion in a Straight Line

MCQ▾

Question

A particle moves as such acceleration is given by a = s 3 sin4t, then:

  1. The acceleration of the particle becomes zero after each interval of π/4 second
  2. The initial velocity of the particle must be zero
  3. The particle comes at its initial position after sometime
  4. The particle must move on a circular path

Choices

Choice (4) Response

a.

2 and 4

b.

1 and 2

c.

1, 2, 3

d.

1 and 3

Question number: 103

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

What are the dimensions of permeability (µ 0) of vacuum?

Choices

Choice (4) Response

a.

[M L T -2 I -2]

b.

[M L T -2 I 2]

c.

[M L -1 T -2 I 2]

d.

[M L -1 T -2 I -2]

Question number: 104

» Kinematics » Motion in a Straight Line

Assertion-Reason▾

Assertion (Ꭺ)

A body having non-zero acceleration can have a constant velocity.

Reason (Ꭱ)

Acceleration is the rate of change of velocity.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

Question number: 105

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

In S = a + bt + ct 2, S is measured in meters and t in seconds. The unit of c is

Choices

Choice (4) Response

a.

ms -2

b.

m

c.

ms -1

d.

None of the above

Question number: 106

» Kinematics » Motion in a Straight Line

MCQ▾

Question

The motion of a body is given by the equation dv (t) /dt = 6.0 - 3v (t), where v (t) is speed in m/s and t in sec.

If body was at rest at t = 0

Choices

Choice (4) Response

a.

The speed varies with the time as v (t) = 2 (1 – e -5t) m/s

b.

The magnitude of the initial acceleration is 6.0 m/s2

c.

The speed is 0.1 m/s when the acceleration is half the initial value

d.

The terminal speed is 4 m/s

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