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MCAT Physics Mcq Questions Electromagnetic Induction

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1. Potential difference is the work done in moving unit positive charge form one point to another




2. Equipotential planes are




3. The value of the capacitance depends upon the




4. A 25eV electron has a speed of




5. A 5 ?F capacitor has a potential difference across its plates of 200 volts. The charge on the capacitor is




6. capacitor is to have an energy content of 20J it must be placed across a potential difference of




7. Equivalent capacitance is greater than individual capacitances in




8. Two oppositely charged balls A and B attract third conducting ball C when placed near them turn by turn. Then ball C must be




9. The number of electrons in one coulomb charge is equal to




10. In a non-uniform electric field a polar molecule will experience




11. SI unit of permitivity of free space is




12. Value of ?r for various dielectrics is always




13. Electric intensity at infinite distance from the point charge is




14. Which one of the following can be taken as the measure of electric intensity ?




15. Electric flux due to a point charge +q is




16. N/C =




17. A charge of 0.10C accelerated through a potential difference of 1000V acquires kinetic energy




18. A capacitor is a perfect insulator for




19. Three capacitors C1 C2 and C3 are connected in parallel as in the Fig. The equivalent capacitance will be




20. In a charged capacitor the energy resides in




21. For what value of ? the electric flux has average value of those of extreme values ?




22. Electric field due to positive charged plate is E = ?/2??. If oppositely charged plate of same amount is placed parallel to it, then resultant field contains amount of energy




23. Work done in moving a point charge from one point to another point of equipotential surface is




24. Selenium becomes a conductor in light so it behaves like




25. Photocopier and inject printer are dealt in




26. If a charged rod is brought closer to a gas filled balloon then




27. If metallic conductor is charged negatively then its weight




28. If mica sheet is placed between the plates of a capacitor the capacity




29. If two charges are increased by two times then force




30. If an electrons is allowed to move along the field in a non uniform electric field then it will follow




31. The practical illustration of the phenomenon of mutual induction is




32. Weber is the unit of




33. Current produced by moving the loop of wire across a magnetic field is called




34. emf induced in a circuit according to Faradays law depends on the




35. cmf generated by A.C dynamo depends upon




36. An alternating current or voltage




37. A dynamo converts




38. Which one of the following functions like a motor?




39. A.C cannot be used for




40. Which of the following works on torque on the current carrying conductor placed in magnetic field.




41. Self inductance of a coil depends upon




42. If the coil is wound on an iron core the flux through it will




43. Energy stored in a magnetic field is given by




44. Inductors acts as a short circuit for




45. For electroplating we use




46. Which of the following uses electric energy and does not convert it into any other form?




47. The only difference between construction of D.C generator and A.C generator is that of




48. A.C and D.C have the same




49. If the secondary coil has Ns turns and the primary Np turns the relation between secondary and primary voltages is given by




50. Power loss in actual transformer is due to