Physics Chapter 1 Measurements Mcqs Test Online 11th Class Punjab

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Question 1 of 17

Physics

1. A mass m has acceleration a.it moves through a distance s in time t. The power used in accelerating the mass is equal to the product of force and velocity. The percentage uncertainties are 0.1% in m, 1% in a, 1.5% in s, 0.5 in t.

4.1%

3.1%

2.1%

2.6%

Question 1 of 17

Question 2 of 17

2. The equation relating pressure and density is p = pgh. How can both sides of this equation be written in terms of base units?

[kgm⁻¹s⁻²] = [kgm⁻³][ms⁻²][m]

[kgm⁻¹s⁻¹] = [kgm⁻¹][ms⁻²][m]

[Nm⁻²] = [kgm⁻³][ms⁻²][m]

[Nm⁻¹] = [kgm⁻³][ms⁻¹][m]

Question 2 of 17

Question 3 of 17

3. A student measured the diameter of wire using a screw gauge with least count 0.001 cm. The correct measurement is

5.3200 cm

5.32 cm

5.320 cm

5.3 cm

Question 3 of 17

Question 4 of 17

4. What is the ratio 1μm/1Gm ?

10⁻¹⁵

10⁻⁹

10⁻³

10⁻¹²

Question 4 of 17

Question 5 of 17

5. The dimensions of frequency f are __________.

[T²]

[LT⁻¹]

[MT⁻¹]

[T⁻¹]

Question 5 of 17

Question 6 of 17

6. Which one is a pair of SI base units?

Kilogram, Kelvin

Ampere, Joule

Meter, Newton

Coulomb, Second

Question 6 of 17

Question 7 of 17

7. Which of the following correctly represent the S.I. unit of pressure?

Newton meter⁻²

Newton

Newton⁻¹

Newton²m⁻¹

Question 7 of 17

Question 8 of 17

8. Which of the following quantities has not been expressed in proper units?

Pressure – Newton m s⁻²

stress/strain = newton metre⁻²

Energy = kg ms⁻²

Force = kg ms⁻²

Question 8 of 17

Question 9 of 17

9. Which of the following may be used as a valid formula to calculate speed of ocean waves? v = speed, g = acceleration due to gravity, y = wave length, p = density, h=depth

V=n₃/v

V=pgh

None of these

V=vygb

Question 9 of 17

Question 10 of 17

10. 1km/1Gm = ………………………………?

μ

10⁻⁶m

10μ

10⁶

Question 10 of 17

Question 11 of 17

11. One fem to is equal to _________

10¹⁵ s

10⁻¹⁵ s

10⁻¹⁶ s

10⁻⁹ s

Question 11 of 17

Question 12 of 17

12. Which one is the least sub multiple?

pico

atto

neon

femto

Question 12 of 17

Question 13 of 17

13. A series of measurements of the acceleration of free fall g is shown in the table which set of results is precise but not accurate?

g/ms⁻²
a.	9.81	9.79	9.84	9.83	9.79
b.	9.81	10.12	9.89	8.94	9.42
c.	9.45	9.21	8.99	8.76	8.51
d.	8.45	8.46	8.5	8.41	8.47

A

D

C

B

Question 13 of 17

Question 14 of 17

14. What is the SI unit of constant k in the following equation? Where F=6πηrv, where F=force v=velocity r=radius.

Kg ms

kgm²s²

kg⁻¹ m² s

Kg m⁻¹s¹

Question 14 of 17

Question 15 of 17

15. Which of the following is a smallest value?

1mm x 1 pm

1cm x 1km

1Gm x 1 Em

A nm x 1m

Question 15 of 17

Question 16 of 17

16. In a cricket match, 500 spectators are counted one by one. How many significant figures will be there in the final result?

2

3

0

1

Question 16 of 17

Question 17 of 17

17. The scientific notation of a number 0.0023 is expressed as

0.023 x 10⁻²

0.23 x 10³

2.3 x 10⁻³

2.3 x 10⁻⁴

Question 17 of 17

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