MCQ Significant Figures and Dimensions, Class 11 Physics

1. There will be total 20 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. Significant figures depend on ________ number of significant figures in given data.

greatest number

all

least number

none of the above

Question 1 of 20

2. Dimensions cannot be used to

check dimensional correctness of a formula

convert units

find value of the constant of proportionality in an equation.

deduce a relation among physical quantities

Question 2 of 20

3. Find the option with 3 significant figures.

0.0268 m

2.068 cm

2.608 cm

26.08 mm

Question 3 of 20

4. Which of the following physical quantities has different dimensions?

Energy

Watt-hour

Momentum

Work

Question 4 of 20

5. What is the dimension of (½)at2?

time[T]

length [L]

length/time² ([L]/[T²])

length/time([L]/[T])

Question 5 of 20

6. Which of the following physical quantity is dimensionless?

Stress

Strain

Area

Pressure

Question 6 of 20

7. The number of significant figures in the distance of one light year , 9.4605 × 10 ¹⁵ m is

Thirty

Five

Four

Three

Question 7 of 20

8. The numbers of significant figures in 1.84 x10^-27 kg are:

Five

Thirty

Three

Four

Question 8 of 20

9. A 2.16 g of a substance occupies 1.5 cm³. Its density to appropriate significant figure is:

1.444

1.44

1.4

1.5

Question 9 of 20

10. Numbers of significant figures in the volume of a cube of side 6.103 m are:

2

4

3

1

Question 10 of 20

11. Magnitude of force F experienced by a certain object moving with speed v is given by F = Kv³, where K is a constant. The dimensions of K are

[M^-2LT]

[ML^-3T]

[MLT^-2]

[ML^-2T]

Question 11 of 20

12. The order of magnitude of a number expressed in scientific notation is

number of decimal places

number of digit before decimal

all digits in the number

power of ten

Question 12 of 20

13. The numbers of significant figures in 9.1 x10^-31 kg are:

Three

Two

Ten

Thirty one

Question 13 of 20

14. Which of the quantity is dimensionless?

Area

Angle

Work

Force

Question 14 of 20

15. A 5.2 g of a substance occupies 1.11 cm³. Its density to appropriate significant figure is:

4.685

4.6845

4.68

4.7

Question 15 of 20

16. The dimensions of k in the equation F = - k x (where F is force and x is displacement)

[MT^-2]

[ML²T^-1]

[MLT^-1]

[MLT^-2]

Question 16 of 20

17. The velocity (in cm s^-1) of a particle is given in terms of time t (in s) by the equation
The dimensions of a, b and c are

L T ², L T, L

L T ^-2, L, T

L², T, L T ^-2

L, L T, T ²

Question 17 of 20

18. Three physical quantity having dimensions [ M L^-1 T^-2] are.

Stress, pressure, density

Stress, pressure, work

Stress, pressure, coefficient of elasticity

Stress, pressure, torque

Question 18 of 20

19. Find the option with 5 significant figures

26.08 mm

0.02608 m

2.608 cm

2.6008 cm

Question 19 of 20

20. A dimensionless quantity

has no unit

must have a unit

cannot exist

might have a unit

Question 20 of 20

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