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
Bihar Board Exam Questions 2024
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 )
Objective Type Questions With Answer
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 )
Most Important Vvi objective question
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 )
Important Physics Objective Question
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 ?
( A ) Change
( B ) Electric Field intensity
( C ) Capacity
( D ) None of these
Ans – ( B )
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