Physics and Measurement (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 23 - 27 of 62

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Question number: 23

» Physics and Measurement » Fundamental and Derived Units. Least Count

Assertion-Reason▾

Assertion (Ꭺ)

L/R and CR both have same dimensions.

Reason (Ꭱ)

L/R and CR both have dimension of time.

Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are false

b.

Ꭺ is true but Ꭱ is false

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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Question number: 24

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

Which of the following pairs have same dimensions?

Choices

Choice (4) Response

a.

Energy and wavelength

b.

Torque and Energy

c.

Angular momentum and work

d.

Energy and Young’s modulus

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Question number: 25

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

X = 3YZ 2 find dimensions of Fin (MKSA) system, if X and Z are the dimensions of capacity and magnetic field respectively

Choices

Choice (4) Response

a.

[M -3 L -2 T -4 A -1]

b.

[M -3 L -2 T 8 A 4]

c.

[M -3 L -2 T 4 A 4]

d.

[M L -2]

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Question number: 26

» Physics and Measurement » Dimensions of Physical Quantities

MCQ▾

Question

Number of particles crossing unit area perpendicular to X-axis in unit time is given by n =-D n 2 - n 1 x 2 - x 1

Equation

, where n1 and n2 are number of particles per unit volume in the position x1 and x2. Find dimensions of D called as diffusion constant.

Choices

Choice (4) Response

a.

[M 0 L T 2]

b.

[M0 L2 T -4]

c.

[M 0 L 2 T -1]

d.

[M 0 L T -3]

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Question number: 27

» Physics and Measurement » Accuracy and Precision of Measuring Instruments

MCQ▾

Question

A wire has a mass 0.3 + 0.003g, radius 0.5 + 0.005 mm and length 6 + 0.06 cm. The maximum percentage error in the measurement of its density is

Choices

Choice (4) Response

a.

1

b.

4

c.

2

d.

3

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