In this article, we are going to give you the Class 12th Physics Objective Question in English Notes 2022. You can download these notes in the free PDF file. You will find the direct link of these notes below, from which you will go directly to Google Drive. By downloading you can read Offline in your Android Phone.
JAC 12th Physics important Questions with Answers pdf | Jac important question of physics class 12 | Jac 12th important question 2022 | Jac 12th physics notes | Jac class 12 physics notes | JAC 12th Objective Question.
JAC 12th Physics important Question with Answer
1. What is the S.I unit of magnetic dipole moment:
- Am²
- Am
- Am⁻²
- None
2. Mention S.I unit of magnetic field:
- Gauss
- Tesla
- Weber
- None
3. Name the electromagnetic radiation used for viewing objects through haze and fog:
- Infrared rays
- X-rays
- Microwaves
- None
4. What is called ratio of potential difference & current :
- Resistance
- Resistivity
- Conduction
- None
5. Electric current is scalar or vector :
- vector
- scalar
- neither vector nor scalar
- none
6. Refractive index of a medium is √2 . What is the value of critical angle for it :
- 45°
- 60°
- 90°
- None
7. What is the main aim of Davisson – Germer Experiment :
- Experimental verification of de – Broglie wave.
- To establish the wave nature of electron.
- To verify the ions of photoelectric laws.
- None of these.
8. Name a physical quantity whose dimensions are the same as those of Plank’s constant.
- Momentum
- Angular momentum
- Energy
- Force
9. The absolute permeability of free space in S . I . units is :
- 1/4π × 10⁻⁷
- 10⁻⁷
- 4π × 10⁻⁷
- 4π × 10⁻⁷
10. If a wire is stretched by a force , its resistance :
- increased
- decreases
- remain constant
- None
11. The unit of Electric current density is :
- Am
- Am²
- Am⁻²
- Am⁻¹
12. As temperature increases the conductivity of a sermiconductor :
- increased
- decreases
- remain constant
- None
13. Potential gradient has unit :
- vm
- vm⁻¹
- vm⁻²
- vm²
14. The SI unit for Impcdance is :
- ohm
- Henry
- Volt
- Ampere
15. The cause of induced cmf in a closed coil is :
- magnetic field
- magnetic flux
- Rotation of Coil
- change in magnetic flux
16. Which part of electromagnetic spectrum is used in radar System ? :
- Ultraviolet
- infrared
- Radio waves
- X-rays
17. Critical angle ( C ) and refractive index ( μ ) of medium are related as :
- μ = Sin c
- μ = cos c
- μ = tan c
- μ = cosec c
18. Me V is the unit for :
- Voltage
- Current
- Power
- Energy
19. Forbidden energy gap of a semiconductor is of the order of :
- 0.1 ev
- 1 ev
- 10 ev
- 5 ev
20. Farad is a unit for
- Electric current
- Electric potential
- Energy
- Capacitance
21. A positively charged body has :
- excess of electrons
- deficit of electrons
- excess of protons
- deficit of protons
22. As temperature rises , the resistance of a conductor :
- Increases
- decreases
- remains constand
- depends upon nature of conductor
23. Drift velocity of free electrons in a conductor does not depend upon its :
- temperature
- length
- Area of cross – section
- material
24. Electromagnetic waves can be deflected by :
- electric field only
- magnetic field only
- both electric & magnetic field
- none of these
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