RRB Assistant Loco Pilot - Electricity and basic electrical phenomena One Line Questions & Answers

1. What is the charge of an electron? — -1.602 x 10^-19 Coulombs

2. A 100 Watt bulb is connected to a 200 Volt supply. What is the current flowing through the bulb? — 0.5 A

3. If a 60W light bulb is used for 10 hours, how much energy does it consume in kilowatt-hours? — 0.6 kWh

4. What is the potential difference across a 10 Ohm resistor when a current of 2 Amperes flows through it? — 20 Volts

5. What does electric charge represent? — A fundamental property of matter that causes it to experience a force when placed in an electromagnetic field

6. What is the SI unit of electric resistance? — Ohm

7. What is the unit of electric current in the CGS system? — Abampere (or EMU of current)

8. What is the unit of electric current density? — Ampere/meter

9. Which component in a circuit opposes the flow of current and dissipates energy as heat? — Resistor

10. What is the term for a closed path through which electric charges can flow? — Circuit

11. What is the opposition to the flow of electric current called? — Resistance

12. What is the property of a material to resist the flow of electric current called? — Resistivity

13. What is the term for a material that conducts electricity poorly but better than an insulator? — Semiconductor

14. What type of materials do not allow electric current to flow through them easily? — Insulators

15. What is the unit of electric charge in the CGS system? — Statcoulomb (or ESU of charge)

16. What is the SI unit of electric dipole moment? — Coulomb-meter

17. When a conductor is heated, its resistance generally: — Increases

18. What is the phenomenon where electric current produces heat? — Joule heating (or Resistive heating)

19. Which phenomenon is responsible for the operation of an electric bell? — Magnetic effect of current

20. What is the SI unit of inductance? — Henry

21. What is the direction of conventional current? — From positive to negative charge

22. If the voltage across a circuit is doubled while the resistance remains constant, the current will: — Double

23. What is the principle behind the operation of an electric motor? — Magnetic effect of current

24. What is the SI unit of capacitance? — Farad

25. What happens to the resistance of a semiconductor when its temperature increases? — Decreases

26. Which material typically offers very low resistance to the flow of electric current? — Conductor

27. What is the SI unit of electric power? — Watt

28. What is the unit of electrical energy commonly used by electricity companies? — Kilowatt-hour (kWh)

29. Which effect of electric current is used in an electric heater? — Heating effect

30. What is the principle behind the operation of an electric generator? — Electromagnetic induction

31. Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them? — Ohm's Law

32. What is the SI unit of electric current? — Ampere

33. What is the SI unit of electric potential difference (voltage)? — Volt

34. What is the unit of electrical conductance? — Siemens

35. What is the SI unit of resistivity? — Ohm-meter

36. What is the unit of electrical conductivity? — Siemens per meter

37. What is the relationship between power (P), current (I), and resistance (R)? — P = I^2 * R

38. What is the formula for electric power (P) in terms of voltage (V) and current (I)? — P = V * I

39. What is a device that stores electrical energy in an electric field? — Capacitor

40. Which of the following is a good electrical conductor? — Copper

41. What is the SI unit of magnetic flux? — Weber

42. What is the SI unit of magnetic dipole moment? — Ampere-meter^2

43. What does Kirchhoff's current law state? — The algebraic sum of currents entering a node is zero.

44. What does Kirchhoff's voltage law state? — The algebraic sum of voltages around any closed loop in a circuit is zero.

45. What is the formula for Ohm's Law? — V = I * R

46. What is the SI unit of electric charge? — Coulomb

47. What is the SI unit of electric flux? — Volt-meter

48. What is the SI unit of electric field strength? — Both A and B

49. What is the term for the flow of electric charge? — Current

50. What is the SI unit of electric energy? — Joule

Electricity and basic electrical phenomena - One Line Questions