NEET Physics: Questions 35 - 38 of 2098

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Question number: 35

» Kinematics » Motion in a Straight Line

MCQ▾

Question

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 > v12v122a

b.

d < (v1v2)22a

c.

d > (v1v2)22a

d.

d <v12v122a

Question number: 36

» Kinematics » Motion in a Plane

MCQ▾

Question

the effective acceleration of a body, when thrown upwards with acceleration a will be:

Choices

Choice (4) Response

a.

(a – g)

b.

ag2

c.

(a + g)

d.

a2g2

Question number: 37

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

In the relation αβeαZkθ , P is pressure, Z is the distance, k is Boltzmann constant and θ is the temperature. The dimensional formula of β will be

Choices

Choice (4) Response

a.

[M 0 L 2 T -1]

b.

[M 1 L 2 T 1]

c.

[M 1 L 0 T -1]

d.

[M 0 L 2 T 0]

Question number: 38

» Physics and Measurement » Technology and Society

Assertion-Reason▾

Assertion (Ꭺ)

Parallax method cannot be used for measuring distances of stars more than 100 light years away.

Reason (Ꭱ)

Because parallax angle reduces so much that it cannot be measured accurately.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

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

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