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Chapter-2: Physical World And Measurement

• Attractive in nature
• Repulsive in nature
• Attractive as well as repulsive in nature
• None of these

2. Which of the following force is not a fundamental force in nature?

• Gravitational force
• Electromagnetic force
• Strong nuclear force
• Tension

3. Strongest force in nature –

• Gravitational force
• Weak force
• Electromagnetic force
• Nuclear force

4. Which of the following fundamental forces is the strongest force?

• Gravitational force
• The electromagnetic force
• Strong nuclear force
• Weak nuclear force

5. Which of the following is the fundamental unit?

• Length, Force, Time,
• Length, Mass, Time,
• Mass, Volume, Height.
• Mass, Velocity, Pressure

6. 1 Fermi –

• 10⁻¹⁵mm
• 10⁻¹⁵cm
• 10⁻¹⁴m
• 10⁻¹⁵m

7. 1 Newton is equivalent to –

• 10⁴ dyne
• 10⁵ dyne
• 10⁶ dyne
• 10⁷ dyne

8. 1 micron is equal to –

• 10⁹ meter
• 10⁻¹² meter
• 10⁻⁶ meter
• 10⁻¹⁵ meter

9. 1 amu is equal to –

• 1.66 × 10⁻²⁴ kg
• 1.66 × 10⁻²⁷ kg
• 1.66 × 10⁻²⁵ kg
• 1.66 × 10⁻³⁰ kg

10. 1 nanometer is equal to –

• 10⁹ mm
• 10⁻⁶ cm
• 10-⁷ cm
• 10-⁹ m

11. SI unit of work is Joule and it is equivalent to –

• 10⁵ erg
• 10⁶ erg
• 10-⁷ erg
• 10⁷ erg

12. 1 light-year =

• 9.46 x 10¹⁵ m
• 94.6 x 10⁻¹⁵ m
• 3.08 x 10⁻¹⁴ m
• None of these

13. 1 parsec =

• 3 x 10⁸ m
• 3.08 x 10¹⁶ m
• 9.46 x 10¹⁵ m
• of these

14. I angstrom ( 1Å ) –

• 10⁻¹⁵ m
• 10⁻¹⁰ m
• 10⁻¹⁰ cm
• 10⁻¹⁵ cm

15. Parsec is the unit of –

• Time
• Distance
• Frequency
• Speed Ans

16. Light year is the unit of –

• Distance
• Time
• Speed
• Intensity of light.

17. Unit of Angular Momentum is –

• N – m
• kg m/s
• kg.m²/s
• kg².m²/s

18. SI unit of Stress is –

• Nm⁻¹
• Nm⁻²
• Nm²
• N-m

19. Unit of Magnetic Moment is –

• Am²
• Am⁻¹
• Am
• A/m²

20. SI unit of Montentum if Inertia is –

• Kgm
• Kgm⁻²
• Kgm²
• Kgm