Physics and Measurement (NEET Physics): Questions 1 - 5 of 61

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Question number: 1

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

The resistance R = V/i where V = 100 + or - 5 volts and i = 10 + 0.2 amperes. What is the total error in R?

Choices

Choice (4) Response

a.

7 %

b.

5 %

c.

5/2 %

d.

5.2 %

Question number: 2

» Physics and Measurement » Errors in Measurement

MCQ▾

Question

If the length of rod A is 3.25 + 0.01 cm and that of B is 4.19 + 0.01 cm then the rod B is longer than rod A by

Choices

Choice (4) Response

a.

0.94 + 0.00 cm

b.

0.94 + 0.02 cm

c.

0.94 + 0.01 cm

d.

None of the above

Question number: 3

» 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: 4

» 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: 5

» 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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