1st Year Physics Chapter 1 MCQs With Answers Measurements

If you are looking for 1st Year Physics Chapter 1 MCQs With Answers Measurements then this is the place where you will find them. This chapter is about physical measurements. First of all, there are physical quantities that have three types base quantities, derived quantities, and supplementary quantities. There is a system called System International that was made to express the units of the physical quantities. There is the concept of precision which is the least count of the instrument or of its absolute uncertainty and accuracy that is concerned with the percentage uncertainty in that measurement. The significant figures are the accurately known digits and the first doubtful digits in any measurements. So, now check out the important Physics Chapter 1 Measurements MCQs with Answers below.

1st Year Physics Chapter 1 MCQs With Answers Measurements

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Physics Chapter 1

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1. Q5. With the help of which one of the following waves big bang theory was proved?

A) Ultra-violet

B) Radio waves

C) X-rays

D) γ-rays

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2. The radius of a wire is 0.24 mm. Then its area of cross-section by taking significant figures into consideration is

A) 0.18 mm2

B) 0.190 mm2

C) 0.180 mm2

D) 0.19 mm2

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3. In an electrical circuit, the current in a resistor is measured as (2.50 ± 0.05) mA. The resistor is marked as 4.7 Ω ± 2%. What would be the %age uncertainty in power dissipation in the resistor?

A) 8%

B) 6%

C) 4%

D) 2%

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4. Light travels a distance of ________ meters in one second.

A) 299, 792, 458

B) 299, 792, 548

C) 1/299, 792, 458

D) 1/299, 792, 548

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5. Which one of the following about systematic error is incorrect?

A) It influences all the measurements of a physical quantity equally

B) It produces a consistent difference in reading

C) It can be reduced by comparing the instrument with a standard instrument

D) It always occurs due to incorrect marking

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6. Which one of the following is not the interdisciplinary area of physics?

A) Super conductivity

B) Geophysics

C) Chemical physics

D) Engineering physics

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7. Q4. Computer chips are made of

A) Super conducting silicon

B) All of these

C) Metallic silicon

D) Metalloid silicon

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8. An ideal standard has two principal characteristics. It is

A) Inaccessible and variable

B) Inaccessible invariable

C) Accessible and invariable

D) Accessible and variable

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9. Standard kg is an alloy cylinder having

A) 20% pt, 80% Ir

B) 90% Ir, 10% pt

C) 10% Ir, 90% Pt

D) 20% Ir, 80%pt

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10. The length, breadth, and thickness of a block are measured to be 50 cm; 2.0 cm, and 1.00 cm. The percentage error in the measurement of volume is

A) 8 %

B) 12.5 %

C) 10 %

D) 0.8 %

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11. Three students measured the length of the same needle. Student A measured with micrometer screw gauge, B with Vernier calipers, and C with meter rod. Which would have greater experimental accuracy of the result?

A) Student C

B) All have the same experimental accuracy

C) Student B

D) Student A

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12. The distance x = x2 – x1 determined by the difference between two separate position measurements x1 = 12.2 + 0.2 cm and x2 = 16.2 + 0.1 cm is recorded as

A) 4.0 + 0.1 cm

B) 4.0 + 0.4 cm

C) 0 + 0.3 cm

D) 4.0 + 0.2 cm

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13. Q3. Light year is

A) Year of light

B) Distance

C) Reciprocal of time

D) Time

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14. To reduce the timing uncertainty, it is advisable to

A) Count for smaller number of swing

B) Use a stopwatch that is less sensitive

C) Count for a larger number of swing

D) Both ‘A’ and ‘C’

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15. Instrumental error is:

A) Systematic error

B) Both

C) None

D) Random error

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16. At present, the numbers of main frontiers of fundamental science are

A) Five

B) Three

C) Two

D) Four

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17. The density of a cube is measured by measuring its mass and the length of its side. If the maximum errors in the measurement of mass and length are 3% and 2%, respectively, then the maximum error in the measurement of density is

A) 1 %

B) 5 %

C) 9 %

D) 7 %

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18. Which one of the following measurement is more accurate?

M1 = 1.0 cm + 0.1 cm M2 = 0.10 cm + 0.01 cm M3 = 0.100 cm + 0.001 cm

A) M2

B) M1

C) M3

D) All have same accuracy

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19. The density of a liquid is 13.6 g cm–3. Its value in SI units is

A) 1.36 kg m–3

B) 136.0 kg m–3

C) 13600 kg m–3

D) 13.6 kg m–3

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20. A student takes 100 observations in an experiment. The second time he took 500 observations in the same experiment. By doing so the possible error becomes

A) 1/10 times lesser

B) 5 times greater

C) 10 times greater

D) 1/5 times lesser

Your score is

1st Year Physics Chapter 1 MCQs With Answers Measurements

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