# Class 12th Physics Objective Question and Answer

Class 12th Physics Objective Question and physics MCQ questions and answers, physics objective question for class 12, Class 12th Quiz English Medium, With the help of these notes, you can also prepare for your board exam and class 12th level competition examination, you will get these notes in English.

Class 12th Physics Objective Questions and Answers | physics MCQ questions and answers | physics objective question for class 12 |12th Physics Objective Questions | 12th board VVI question 2022.

## Physics Objective Question For Class 12

1. The unit for an electrical field is :

• volt
• Ampere
• ohm
• NC⁻¹
NC⁻¹

2. When a conductor is heated, its resistance :

• Increases
• decreases
• remains constant
• depends upon the nature of the conductor
Increases

3. The electrical potential at a point inside a charged spherical shell is :

• Zero
• Constant
• Variable
• Maximum
Zero

4. What is the SI unit of magnetic dipole moment :

• Am²
• Am
• Am⁻²
• None
Am²

5. Mention the S.I unit of a magnetic field :

• gauss
• Tesla
• Weber
• None
Tesla

6. Kirchoff loop rule is a direct consequence of low of conservation of :

• Charge
• Momentum
• Angular Momentum
• Energy
energy

7. Lenz’s law is in accordance with the low of conservation of :

• Momentum
• Angular Momentum
• Charge
• Energy
energy

8. Which of the Following can be Deflected by a magnetic field :

• α – rays
• β – rays
• γ – rays
• a & b Both
a & b Both

9. Name the electromagnetic radiation used for viewing objects through haze & fog :

• Infrared
• rays
• x-rays
• Microwaves None
Infrared

10. Which Colour of light gets deviated the most when sunlight passes through a prism :

• Red
• Yellow
• Violet
• Green
Violet

11. The radius of curvature of a mirror is 20 cm. What is its Focal length :

• 5 cm
• 10 cm
• 20 cm
• None
10 cm

12. Electron & Proton are moving at the same speed. Which we having more Wavelength.

• Electron
• Proton
• Both Have Same
• None Of This
Electron

13. Which series of H-atom spectrum lies in the ultra-violet region :

• Balmer series
• Lyman series
• Pascher series
• None of this
Lyman series

14. What is Called Ratio Of Potential difference & Current :

• Resistance
• Resistivity
• Conduction
• none
Resistance

15. Electric current is Scalar or Vector :

• vector
• scalar
• neither vector & scalar
• none
scalar

16. If a wire stretched by a force, its resistance :

• Increases
• decreases
• remains constant
• None
Increases

17. The unit of electrical current density is :

• Am²
• Am
• Am⁻²
• Am⁻¹
Am⁻²

18. As temperature increases the conductivity of a semiconductor :

• Increases
• decreases
• remains constant
• None
Increases

19. Potential gradient has unit :

• vm
• vm⁻¹
• vm⁻²
• vm²
vm⁻¹

20. The SI unit for impedance is :

• ohm
• Henry
• Volt
• Ampere
ohm

21. The Caused of induced emf in a closed coil is :

• Magnetic field
• Magnetic flux
• Rotation of coil
• Change in Magnetic flux
Magnetic flux

22. The absolute permeability of free space in S.I units is :

• 1⁄4π×₁₀⁻⁷
• ₁₀⁻⁷
• 4π×₁₀⁻⁷
• 4π×₁₀⁷
4π×₁₀⁻⁷

23. Which part of the electromagnetic spectrum is used in a radar system?

• Ultraviolet
• infrared
• x rays

24. Critical Angle (C) and refractive index (µ) of medium are related as :

• µ = sin c
• µ = cos c
• µ = tan c
• µ = cosec c
µ = cosec c

25. MeV is the unit for :

• Voltage
• Current
• Power
• Energy
energy

26. Farad is unit for :

• Electric current
• electric potential
• Energy
• capacitance
capacitance

27. A positively charged body has :

• excess of electron
• deficit of electrons
• excess of proton
• deficit of proton
excess of protony

28. As a temperature rises, the resistance of a conductor :

• Increases
• decreases
• remains constant
• depends upon the nature of the conductor
Increases

29. Zener diode is used for :

• Oscillations
• amplifications
• rectification
• voltage stabilization.
voltage stabilization

30. eV is a unit for :

• potential difference
• power
• energy
• momentum
energy

### 5 thoughts on “Class 12th Physics Objective Question and Answer”

1. Sir physics questions chahiye sir Bihar board ka with anwer

• Aap 12th pass ho.Agr ho toh help chaiye.

• Ok

2. 3. 