| Chapter-1: Physical World And Measurement |
1. Electromagnetic force is –
- 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