MCQ Questions for Class 12 Physics Chapter 1 Electric Charges and Fields with Answer

MCQ Questions for Class 12 Physics Chapter 1 Download Free PDF: CBSE RBSE and NCERT Physics class 12 MCQs for Chapter 1 “Electric Charges and Fields” is very important for the students who want to get good marks. Neet MCQs

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MCQ Questions for Class 12 Physics Chapter 1 Electric Charges and Fields with PDF

Q1. Which of the following statements is not true about Gauss’s law?

(a) Gauss’s law is true for any closed surface.
(b) The term q on the right side side of Gauss’s law includes the sum of all charges enclosed by the surface.
(c) Gauss’s law is not much useful in calculating electrostatic field when the system has some symmetry.
(d) Gauss’s law is based on the inverse square dependence on distance contained in the coulomb’s law

(c) Gauss’s law is not much useful in calculating electrostatic field when the system has some symmetry.

Q2. A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in the figure. The ratio of charges Q and q is

(a) 4
(b) 1/4
(c) -4
(d) -1/4

(d) -1/4

Q3. The force per unit charge is known as | Physics MCQs for Class 12 with Answers Chapter 1 Electric Charges and Fields 1

(a) electric flux
(b) electric field
(c) electric potential
(d) electric current

(a) electric flux

Q4. Electric field lines provide information about

(a) field strength
(b) direction
(c) nature of charge
(d) all of these

(d) all of these

Q5. The SI unit of electric flux is

(a) N C-1 m-2
(b) N C m-2
(c) N C-2 m2
(d) N C-1 m2

(d) N C-1 m2

Q6. The unit of electric dipole moment is

(a) newton
(b) coulomb
(d) debye

(d) debye

Q7. If an electric dipole is kept in a uniform electric field then resultant electric force on it is :

(a) always zero
(b) never zero
(c) depend upon capacity of dipole
(d) None

(a) always zero

Q8. The number of electron-taken out from a body to produce 1 coulomb of charge will be :

(a) 6.25 × 1018
(b) 625 × 1018
(c) 6.023 × 1023
(d) None

(a) 6.25 × 1018

Q9. The work done in rotating an electric dipole in an electric field:

(a) W = ME (1 – cos θ)
(b) W = ME tan θ
(c)W = ME sec θ
(d) None

(a) W = ME (1 – cos θ)

Q10. If sphere of bad conductor is given charge then it is distributed on:

(a) surface
(b) inside the surface
(c) only inside the surface
(d) None

(d) None

Q11. Electric field in a cavity of metal:

(a) depends upon the surroundings
(b) depends upon the size of cavity
(c) is always zero
(d) is not necessarily zero

(d) is not necessarily zero

Q12. The dielectric constant of a metal is:

(a) 0
(b) 1
(c) ∞
(d) -1

(c) ∞

Q13. 1 coulomb is equal to:

(a) 3 × 109 e.s.u.
(b) 13 × 109 e.s.u.
(c) 3 × 1010 e.s.u.
(d) 13 × 1010 e.s.u.

(a) 3 × 109 e.s.u.

Q14. On rubbing, when one body gets positively charged and other negatively charged, the electrons transferred from positively charged body to negatively charged body are

(a) valence electrons only
(b) electrons of inner shells
(c) both valence electrons and electrons of inner shell
(d) yet to be established

(a) Valence electrons are outermost electrons these can get transferred on rubbing.

Q15. Which of the following is the best insulator?

(a) Carbon
(b) Paper
(c) Graphite
(d) Ebonite

(d) Ebonite

Q16. If a body is negatively charged, then it has

(a) excess of electrons
(b) excess of protons
(c) deficiency of electrons
(d) deficiency of neutrons

(a) excess of electrons

Q17. When a body is charged by induction, then the body

(a) becomes neutral
(b) does not lose any charge
(c) loses whole of the charge on it
(d) loses part of the charge on it

(b) does not lose any charge

Q18. On charging by conduction, mass of a body may

(a) increase
(b) decreases
(c) increase or decrease
(d) None of these

(c) increase or decrease

Q19. Quantisation of charge implies

(a) charge cannot be destroyed
(b) charge exists on particles
(c) there is a minimum permissible charge on a particle
(d) charge, which is a fraction of a coulomb is not possible.

(d) charge, which is a fraction of a coulomb is not possible.

Q20. If an object possesses an electric charge, it is said to be
electrified or … A … When it has no charge, it is said to
be … B … Here, A and B refer to

(a) charged, neutral
(b) neutral, charged
(c) discharged, charged
(d) active, reactive

(a) charged, neutral

Q21. A positively charged rod is brought near an uncharged
conductor. If the rod is then suddenly withdrawn, the charge
left on the conductor will be

(a) positive
(b) negative
(c) zero
(d) cannot say

(c) zero

Q22. Two spheres A and B of exactly same mass are given equal
positive and negative charges respectively. Their masses
after charging

(a) remains unaffected
(b) mass of A > mass of B
(c) mass of A < mass of B
(d) Nothing can be said

(c) mass of A < mass of B

Q23. Two point charges +8q and -2q are located at ,v = O and ,v = L respectively. The location of a point on the .v-axis at which the net electric field due to these two point charges b is zero :

(a) 4L
(b) 8L
(c) L/4
(d) 2L

(d) 2L

Q24. The graph drawn between V are r for a non-conducting charged solid sphere of radius R for r < R will be :

(a) straight line
(b) parabola
(c) hyperbola
(d) None of these

(d) None of these

Q25. Corona discharge takes place:

(a) at the surface of a conductor
(b) near the sharp points of a conductor
(c) outside the conductor
(d) at the centre of the conductor

(b) near the sharp points of a conductor

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