Physics and Measurement (NEET Physics): Questions 39 - 44 of 61

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Question number: 39

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

If L = 2.331 cm, B = 2.1 cm, then L + B =

Choices

Choice (4) Response
a.

4, 43 cm

b.

4 cm

c.

4.431 cm

d.

4.4 cm

Question number: 40

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

In an experiment, the following observations were recorded: L = 2.820 m, M = 3.00 kg, l = 0.087 cm, Diameter D = 0.041 cm. Taking g = 9.81 m/s2 using the formula, Y =

4MgLπD2l

, the maximum percentage error in Y is

Choices

Choice (4) Response
a.

6.50 %

b.

4.56 %

c.

7.96 %

d.

8.42 %

Passage

The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 3500Hz is used. The first resonating length is measured as 14.6 cm and the second resonating length is measured as 24.0 cm.

Question number: 41 (1 of 2 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

Calculate the end correction.

Choices

Choice (4) Response
a.

9.9 cm

b.

9.2 cm

c.

9.1 cm

d.

9.4 cm

Question number: 42 (2 of 2 Based on Passage) Show Passage

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

Calculate the speed of sound at the room temperature

Choices

Choice (4) Response
a.

276 m/s

b.

675 m/s

c.

930 m/s

d.

658 m/s

Question number: 43

» Physics and Measurement » Errors in Measurement

Assertion-Reason▾

Assertion (Ꭺ)

Number of significant figures in 0.005 is one and that in 0.500 is three.

Reason (Ꭱ)

This is because zero is not significant.

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 but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

Question number: 44

» Physics and Measurement » Dimensions of Physical Quantities

Assertion-Reason▾

Assertion (Ꭺ)

The time period of a pendulum is given by the formula, T = 2π lg

Reason (Ꭱ)

According to the principle of homogeneity of dimensions, only that formula is correct in which the dimensions of L. H. S. is equal to dimensions of R. H. S.

Choices

Choice (4) Response
a. Ꭺ is true but Ꭱ is false
b. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
d. Ꭺ is false but Ꭱ is true

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