NEET Physics: Questions 7 - 10 of 2098

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Question number: 7

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

A physical quantity x depends on quantities y and z as follows: x = Ay + B tan Cz, where A, B and C are constants. Which of the following do not have the same dimensions?

Choices

Choice (4) Response

a.

x and A

b.

y and B/A

c.

C and z-1

d.

x and B

Question number: 8

» 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 = (3t 2 - 6t) metres, y = (t 2 - 2t) 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 acceleration of the particle is zero at t = 0 second

c.

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

d.

Both a. and b. are correct

Question number: 9

» Physics and Measurement » SI Units

MCQ▾

Question

The magnitude of any physical quantity

Choices

Choice (4) Response

a.

depends on the method of measurement

b.

does not depend on the method of measurement

c.

is more in SI system than in CGS system

d.

directly proportional to the fundamental units of mass, length and time

Question number: 10

» Physics and Measurement » Errors in Measurement

Assertion-Reason▾

Assertion (Ꭺ)

Out of three measurements l = 0.7 m; l = 0.70 m and l = 0.700 m, the last one is most accurate.

Reason (Ꭱ)

In every measurement, only the last significant digit is not accurately known.

Choices

Choice (4) Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are false

d.

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

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