Bihar Board 12 Physics Objective : Bihar Board Class 12th Inter Exam Objective Question 2023, English Medium

Bihar Board 12 Physics Objective 

 Board Exam 2024 Question

1. A soap bubble is given a negative change, then it’s radius

( A ) Increase
( B ) Decrease
( C ) Remains unchanged
( D ) May increases or decreases

Ans – ( A )

2. Metallic sphere of radius R is charged to potential V. Then charge q is proportional to

( A ) V
( B ) R
( C ) Both ( A ) and ( B )
( D ) None of these

Ans – ( C )

3. If sphere of bad conductor is given change then it is distributed on :

( A ) Surface
( B ) Only inside the surface
( C ) Inside the surface
( D ) None of these

Ans – ( D )

4. In which of the following forms is the energy stored in a capacitor ?

( A ) Change
( B ) Potential
( C ) Capacitance
( D ) Electric Field

Ans – ( D )

5. The potential gradient at which dielectric of the condenser just gets punctured, is known as :

( A ) Dielectric constant
( B ) Dielectric strength
( C ) Dielectric resistance
( D ) Dielectric number

Ans – ( B )

6. Which of the laws gives the force between two charges at rest ?

( A ) Gauss theorem
( B ) Kirchhoff’s rules
( C ) Coulomb’s law
( D ) Faraday’s law

Ans – ( C )

7. If the distance between two charged particles is doubled the force between them

( A ) Gets doubled
( B ) Gets halved
( C ) Gets quardrupled
( D ) Become one-fourth

Ans – ( D )

8. An electric dipole is placed parallel to X-axis in an electric field. The force on it will be

( A ) Zero
( B ) Normal to X-axis
( C ) Along X-axis
( D ) None of these

Ans – ( D )

9. Of distance of two charges from origin is increased then the value of electrostatic force :

( A ) Increase
( B ) Decrease
( C ) Remain unchanged
( D ) May increase or decrease

Ans – ( D )

10. Charges A and B attract each other. Charges B and V attract each other :

( A ) Repel each other
( B ) Will attract each other
( C ) Will Not affect each other
( D ) More information needed

Ans – ( A )

11. An electric dipole is enclosed by a surface. The total Electric flux over the surface is

( A ) Infinite
( B ) Zero
( C ) Dependent on the charges
( D ) Dependent upon the position of the dipole

Ans – ( B )

12. The cause of the charging a body is

( A ) Transfer of protons
( B ) Transfer of neutrons
( C ) Transfer of electrons
( D ) Transfer of both protons and neutrons

Ans – ( C )

13. Two copper spheres of the same radius, one solid and the other hollow, are charged to the same potential. Which will have more charge ?

( A ) Solid sphere
( B ) Hollow sphere
( C ) Both will have an equal change
( D ) None of these

Ans – ( C )

14. A parrot comes and sits on a bare hegh power line. It will

( A ) Experience a mild shock
( B ) Experience a strong shock
( C ) Get killed instantaneous
( D )Not be affected practically

Ans – ( D )

15. Van de Graff generator is used to :

( A ) Store electric energy
( B ) Build up High voltage of few million volts
( C ) Decelerate change particle like electrons
( D ) Both ( A ) and ( B ) are correct

Ans – ( B )

Bihar Board 12 Physics Objective

 

16. Electric Field lines provide information about :

( A ) Field strength
( B ) Direction
( C ) Nature of charge
( D ) all of these

Ans – ( D )

17. The law, governing the force acting between two electric charge is known as :

( A ) Ampere’s law
( B ) Ohm’s law
( C ) Faraday’s law
( D ) Coulomb’s law

Ans – ( D )

18. Quantisation of charge indicates that :

( A ) Change, which is a fraction of charge on an electron, is not possible
( B ) A charge can not be destroyed
( C ) Charge exists on particles
( D ) There exists a minimum permissible charge on a particle

Ans – ( A )

19. S I. unit of electric dipole is

( A ) CN
( B ) Cm
( C ) C
( D ) C/m

Ans – ( B )

20. Which of the following has unit volt/metre ?

( A ) electric flux
( B ) electric potential
( C ) electric capacity
( D ) electric field

Ans – ( D )

21. When a body is charged, it’s mass

( A ) Increase
( B ) Decrease
( C ) Remains
( D ) May increase or decrease

Ans – ( D )

22. Electrostatic Field is

( A ) Conservative
( B ) Non conservative
( C ) Somewhere conservative and somewhere non conservative
( D ) None of these

Ans – ( A )

23. Coulombian Force is

( A ) Central Force
( B ) Electric Force
( C ) Both ( A ) and ( B )
( D ) None of these

Ans – ( C )

24. In the uniform electric field along X-axis, then equipotential is along :

( A ) XY – plane
( B ) XZ – plane
( C ) YZ – plane
( D ) anywhere

Ans – ( C )

25. The unit of intensity of electric field is :

( A ) metre/volt
( B ) joule/Newton
( C ) coulomb/Newton
( D ) Newton/coulomb

Ans – ( D )

26. When a soap bubble is charged, it’s radius:

( A ) Increase
( B ) Decrease
( C ) Remains the same
( D ) Become Zero

Ans – ( A )

27. When a body becomes negatively charged, it’s mass

( A ) Decrease
( B ) Increase
( C ) Remains the same
( D ) Non of these

Ans – ( B )

28. When placed in a uniform field, a dipole experiences :

( A ) A net force
( B ) A torque
( C ) Both ( A ) and ( B )
( D ) None of these

Ans – ( B )

29. The belt of Van de Graaf generation gets charge by

( A ) Corona discharge
( B ) Induction
( C ) Electrification
( D ) Non of these

Ans – ( A )

30. When velocity of charged body increases, it’s change :

( A ) May increase
( B ) May decrease
( C ) May ( A ) or ( B )
( D ) Does not change

Ans – ( D )

31. In a uniform electric field, force per unit change defines :

( A ) Electric intensity
( B ) Gravitational intensity
( C ) Electric Potential
( D ) None of these

Ans – ( D )

32. Which of the following is Vector ?

⁰( A ) Change
( B ) Electric Field intensity
( C ) Capacity
( D ) None of these

Ans – ( B )

 

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