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MCQ Questions for Class 12 Physics Chapter 1 Electric Charges and Field

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1. Which one of the following is the unit of electric field?




2. Three charges + 3q + q and Q are placed on a st. line with equal separation. In order to maket the net force on q to be zero, the value of Q will be :




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




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




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




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




7. Electric field in a cavity of metal:




8. The dielectric constant of a metal is:




9. 1 coulomb is equal to:




10. Each of the two point charges are doubled and their distance is halved. Force of interaction becomes p times, w here p is :




11. oulomb’s law in vector form can be written as F⃗ = (14πεn) (q1q2r2)r⃗ where ε0 is the permitivity of free space. The SI units of ε0 will be:




12. The dimensional representation of cu will be :




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




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




15. The SI units of electric dipole moment are:




16. If two conducting sphere are connected after charging separately then




17. A soap bubble is given a negative charge, then its radius:




18. A soap bubble is given a negative charge, then its radius:




19. In non-uniform electric field, electric dipole experiences:




20. An electron is sent in an electric field of magnitude 9.1 × 106NC-1. The acceleration produced in it is :




21. 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 :




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




23. Corona discharge takes place:




24. The belt of a Vande Graaf generator gets charge by :




25. Quantisation of charge implies:




26. The conservation of electric charge implies that:




27. The number of electrons contained in one coulomb of charge is:




28. The unit of intensity of electric field is :




29. The unit of intensity of electric field is :




30. 1 V equals to:




31. 1 V m-1 equals to:




32. The minimum amount of charge observed so far is: