Units and Measurements

1. Name the weakest force in nature

• nuclear force

• weak force

• gravitational force

• electromagnetic force

2. S I Unit of Luminous Intensity is:-

• current

• kelvin

• ampere

• candela

3. Unit of mass in MKS system is:-

• kilogram

• gram

• pound

• all the above

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

4. Steradian is the unit of_____________

• plane angle

• solid angle

• stress

• strain

5. One light year is ______________m.

• 1.496 x 10¹¹m

• 9.46 x 10¹¹m

• 1.496 x 10¹⁵m

• 9.46 x 10¹⁵m

6. Significant figure in the value 0.06900 is:-

• 5

• 6

• 4

• none of the above

7. [M L T^-2] is the dimension of:-

• energy

• momentum

• power

• force

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

8. Name a dimensionless quantity with unit

• strain

• relative density

• angle

• angular velocity

9. Which of the following pairs have same dimensions:-

• work and potential energy

• pressure and stress

• velocity and speed

• all of the above

10. Which of the following is an example for Instrumental error

• parallax error

• random error

• zero error

• none of the above