Physics Chapter 1 Measurements Mcqs Test Online 11th Class Punjab

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Question 1 of 17

Physics

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

Kg ms

kg⁻¹ m² s

Kg m⁻¹s¹

kgm²s²

Question 1 of 17

Question 2 of 17

2. 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

B

C

D

Question 2 of 17

Question 3 of 17

3. One fem to is equal to _________

10⁻¹⁶ s

10⁻¹⁵ s

10⁻⁹ s

10¹⁵ s

Question 3 of 17

Question 4 of 17

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

Kilogram, Kelvin

Meter, Newton

Ampere, Joule

Coulomb, Second

Question 4 of 17

Question 5 of 17

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

Force = kg ms⁻²

Energy = kg ms⁻²

Pressure – Newton m s⁻²

stress/strain = newton metre⁻²

Question 5 of 17

Question 6 of 17

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

[Nm⁻¹] = [kgm⁻³][ms⁻¹][m]

[kgm⁻¹s⁻¹] = [kgm⁻¹][ms⁻²][m]

[kgm⁻¹s⁻²] = [kgm⁻³][ms⁻²][m]

[Nm⁻²] = [kgm⁻³][ms⁻²][m]

Question 6 of 17

Question 7 of 17

7. What is the ratio 1μm/1Gm ?

10⁻³

10⁻¹⁵

10⁻⁹

10⁻¹²

Question 7 of 17

Question 8 of 17

8. Which one is the least sub multiple?

atto

pico

neon

femto

Question 8 of 17

Question 9 of 17

9. The dimensions of frequency f are __________.

[T⁻¹]

[LT⁻¹]

[T²]

[MT⁻¹]

Question 9 of 17

Question 10 of 17

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

0

3

2

1

Question 10 of 17

Question 11 of 17

11. Which of the following is a smallest value?

1cm x 1km

1mm x 1 pm

A nm x 1m

1Gm x 1 Em

Question 11 of 17

Question 12 of 17

12. 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.

2.1%

4.1%

2.6%

3.1%

Question 12 of 17

Question 13 of 17

13. 1km/1Gm = ………………………………?

10μ

μ

10⁻⁶m

10⁶

Question 13 of 17

Question 14 of 17

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

Newton⁻¹

Newton

Newton meter⁻²

Newton²m⁻¹

Question 14 of 17

Question 15 of 17

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

2.3 x 10⁻³

0.23 x 10³

2.3 x 10⁻⁴

0.023 x 10⁻²

Question 15 of 17

Question 16 of 17

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

5.320 cm

5.32 cm

5.3 cm

5.3200 cm

Question 16 of 17

Question 17 of 17

17. 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

None of these

V=vygb

V=pgh

Question 17 of 17

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