Physics Chapter 1 Measurements Mcqs Test Online 11th Class Punjab

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Question 1 of 17

Physics

1. 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

B

D

C

A

Question 1 of 17

Question 2 of 17

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

3

0

1

2

Question 2 of 17

Question 3 of 17

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

0.23 x 10³

0.023 x 10⁻²

2.3 x 10⁻³

2.3 x 10⁻⁴

Question 3 of 17

Question 4 of 17

4. 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=vygb

V=n₃/v

None of these

V=pgh

Question 4 of 17

Question 5 of 17

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

5.32 cm

5.3 cm

5.320 cm

5.3200 cm

Question 5 of 17

Question 6 of 17

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

Ampere, Joule

Coulomb, Second

Meter, Newton

Kilogram, Kelvin

Question 6 of 17

Question 7 of 17

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

[Nm⁻²] = [kgm⁻³][ms⁻²][m]

[kgm⁻¹s⁻¹] = [kgm⁻¹][ms⁻²][m]

[kgm⁻¹s⁻²] = [kgm⁻³][ms⁻²][m]

[Nm⁻¹] = [kgm⁻³][ms⁻¹][m]

Question 7 of 17

Question 8 of 17

8. 1km/1Gm = ………………………………?

μ

10⁶

10⁻⁶m

10μ

Question 8 of 17

Question 9 of 17

9. 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.

2.6%

2.1%

4.1%

3.1%

Question 9 of 17

Question 10 of 17

10. What is the ratio 1μm/1Gm ?

10⁻⁹

10⁻³

10⁻¹⁵

10⁻¹²

Question 10 of 17

Question 11 of 17

11. Which one is the least sub multiple?

femto

pico

atto

neon

Question 11 of 17

Question 12 of 17

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

Newton²m⁻¹

Newton meter⁻²

Newton⁻¹

Newton

Question 12 of 17

Question 13 of 17

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

kg⁻¹ m² s

Kg ms

Kg m⁻¹s¹

kgm²s²

Question 13 of 17

Question 14 of 17

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

Energy = kg ms⁻²

Pressure – Newton m s⁻²

stress/strain = newton metre⁻²

Force = kg ms⁻²

Question 14 of 17

Question 15 of 17

15. One fem to is equal to _________

10¹⁵ s

10⁻⁹ s

10⁻¹⁵ s

10⁻¹⁶ s

Question 15 of 17

Question 16 of 17

16. Which of the following is a smallest value?

1cm x 1km

A nm x 1m

1Gm x 1 Em

1mm x 1 pm

Question 16 of 17

Question 17 of 17

17. The dimensions of frequency f are __________.

[MT⁻¹]

[LT⁻¹]

[T⁻¹]

[T²]

Question 17 of 17

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