SSC JE Exam - resistance inductance capacitance current voltage power energy units circuit laws kirchhoff network theorems Online Test (MCQ Quiz)

1. What is the SI unit of electrical resistance?

A) Ampere B) Volt C) Ohm D) Watt

2. Which fundamental 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?

A) Kirchhoff's Current Law B) Kirchhoff's Voltage Law C) Ohm's Law D) Joule's Law

3. What property of an electrical component opposes the flow of electric current?

A) Inductance B) Capacitance C) Conductance D) Resistance

4. What is the SI unit of electric current?

A) Ohm B) Volt C) Ampere D) Coulomb

5. Which law states that the algebraic sum of currents entering a node (or junction) is equal to the algebraic sum of currents leaving that node?

A) Ohm's Law B) Kirchhoff's Voltage Law C) Kirchhoff's Current Law D) Faraday's Law

6. What is the SI unit of electrical potential difference (voltage)?

A) Ampere B) Ohm C) Watt D) Volt

7. What property of an electrical component stores energy in an electric field?

A) Resistance B) Inductance C) Capacitance D) Conductance

8. What is the SI unit of electrical power?

A) Joule B) Watt C) Volt-Ampere D) Ohm

9. Which law states that the algebraic sum of all the potential differences around any closed circuit loop is zero?

A) Kirchhoff's Current Law B) Ohm's Law C) Joule's Law D) Kirchhoff's Voltage Law

10. What is the SI unit of electrical energy?

A) Watt-hour B) Joule C) Kilowatt-hour D) All of the above

11. The property of an electrical component that stores energy in a magnetic field when electric current flows through it is called:

A) Capacitance B) Resistance C) Inductance D) Conductivity

12. What is the SI unit of inductance?

A) Farad B) Henry C) Weber D) Tesla

13. What is the SI unit of capacitance?

A) Henry B) Farad C) Ohm D) Coulomb

14. Power in a DC circuit is calculated as the product of voltage and current. What is the formula?

A) P = V / I B) P = I / V C) P = V * I D) P = V + I

15. If a 10 Ohm resistor is connected to a 5 Volt source, what is the current flowing through the resistor according to Ohm's Law?

A) 0.5 A B) 2 A C) 50 A D) 5 A

16. A circuit element has a resistance of 20 Ohms and a current of 3 Amperes flows through it. What is the voltage drop across the element?

A) 3 V B) 60 V C) 23 V D) 6.67 V

17. What is the energy consumed by a 100 Watt bulb in 1 minute?

A) 100 Joules B) 600 Joules C) 6000 Joules D) 1000 Joules

18. A series circuit consists of three resistors: 5 Ohm, 10 Ohm, and 15 Ohm. If a 30 Volt source is connected across the series combination, what is the total resistance?

A) 5 Ohm B) 10 Ohm C) 15 Ohm D) 30 Ohm

19. In a parallel circuit with two resistors, R1 = 10 Ohm and R2 = 20 Ohm, connected to a 12 Volt source, what is the total current drawn from the source?

A) 0.4 A B) 1.2 A C) 1.8 A D) 3.6 A

20. What is the primary function of a capacitor in a circuit?

A) To oppose changes in current B) To store energy in an electric field C) To dissipate energy as heat D) To increase the resistance of the circuit

21. What is the primary function of an inductor in a circuit?

A) To store energy in an electric field B) To oppose changes in voltage C) To dissipate energy as heat D) To oppose changes in current

22. According to Kirchhoff's Current Law, if currents of 2A, 3A, and 1A are entering a junction, and 4A is leaving, what is the value of the unknown current leaving the junction?

A) 0 A B) 1 A C) 2 A D) 6 A

23. Which theorem simplifies complex networks by replacing a portion of the network (connected to a load) with an equivalent circuit consisting of a single voltage source and a series resistor?

A) Superposition Theorem B) Thevenin's Theorem C) Norton's Theorem D) Reciprocity Theorem

24. Which theorem simplifies complex networks by replacing a portion of the network (connected to a load) with an equivalent circuit consisting of a single current source and a parallel resistor?

A) Thevenin's Theorem B) Superposition Theorem C) Norton's Theorem D) Maximum Power Transfer Theorem

25. The Superposition Theorem is applicable to:

A) Non-linear circuits only B) Linear circuits with single source C) Linear circuits with multiple sources D) Circuits with dependent sources only

26. The unit 'Watt-hour' is a unit of:

A) Power B) Energy C) Current D) Voltage

27. If the voltage across a capacitor is doubled, its stored energy:

A) Remains the same B) Is doubled C) Is quadrupled D) Is halved

28. If the current through an inductor is doubled, the energy stored in its magnetic field:

A) Remains the same B) Is doubled C) Is quadrupled D) Is halved

29. What is the equivalent resistance of two 10 Ohm resistors connected in parallel?

A) 5 Ohm B) 10 Ohm C) 20 Ohm D) 2.5 Ohm

30. What is the equivalent capacitance of two 10 micro Farad capacitors connected in series?

A) 5 micro Farad B) 10 micro Farad C) 20 micro Farad D) 2.5 micro Farad

31. What is the equivalent inductance of two 10 Henry inductors connected in parallel?

A) 5 Henry B) 10 Henry C) 20 Henry D) 2.5 Henry

32. Thevenin's equivalent resistance (Rth) is found by:

A) Turning off all independent sources and calculating the equivalent resistance from the load terminals B) Turning on all independent sources and calculating the equivalent resistance C) Short-circuiting the voltage source and opening the current source D) Using the ratio of open-circuit voltage to short-circuit current

33. Norton's equivalent current (In) is found by:

A) Calculating the open-circuit voltage across the load terminals B) Calculating the short-circuit current through the load terminals C) Turning off all independent sources and calculating the equivalent resistance D) Using the ratio of short-circuit current to open-circuit voltage

34. The Maximum Power Transfer Theorem states that for maximum power to be delivered to a load, the load resistance must be:

A) Zero B) Infinite C) Equal to the source resistance D) Half of the source resistance

35. Which of the following is NOT a passive electrical component?

A) Resistor B) Capacitor C) Inductor D) Transistor

36. What does Kirchhoff's Voltage Law (KVL) fundamentally relate to?

A) Conservation of charge B) Conservation of energy C) Conservation of mass D) Conservation of momentum

37. What is the reciprocal of resistance?

A) Conductance B) Reactance C) Susceptance D) Impedance

38. A circuit has a voltage of 12V and a resistance of 4 Ohms. If the resistance is increased to 8 Ohms while the voltage remains constant, how does the current change?

A) It doubles B) It halves C) It quadruples D) It remains the same

39. What is the unit of charge?

A) Ampere B) Volt C) Ohm D) Coulomb

40. In a circuit, 60 Coulombs of charge pass a point in 10 seconds. What is the current?

A) 0.16 A B) 6 A C) 60 A D) 10 A

41. What is the electrical property that opposes the change in voltage across it?

A) Resistance B) Inductance C) Capacitance D) Conductance

42. The SI unit of power, the Watt, is equivalent to:

A) Volt / Ampere B) Volt * Ampere C) Ampere / Volt D) Joule / Second

43. A 12 Ohm resistor and a 6 Ohm resistor are connected in series. If the voltage across the combination is 36V, what is the current flowing through the 12 Ohm resistor?

A) 2 A B) 3 A C) 6 A D) 1 A

44. If a 10 micro Farad capacitor is charged to 100 Volts, what is the energy stored?

A) 0.05 Joules B) 0.1 Joules C) 0.5 Joules D) 1 Joule

45. Which of the following is a consequence of Kirchhoff's Current Law?

A) Voltage drops in a loop sum to zero B) Power is conserved in a closed loop C) Charge is conserved at a junction D) Energy is conserved in a circuit

46. Thevenin's theorem is particularly useful for analyzing:

A) Networks with only one source B) Non-linear networks C) Networks where the voltage or current at a specific load is to be found under various conditions D) Networks with mutual inductance

47. What is the unit of electrical conductance?

A) Ohm B) Siemens C) Farad D) Henry

48. A 10 Ohm resistor dissipates 40 Watts of power. What is the current flowing through it?

A) 1 A B) 2 A C) 4 A D) 16 A

49. The energy stored in a capacitor is proportional to the square of the:

A) Capacitance B) Charge C) Voltage D) Reciprocal of capacitance

50. Which theorem allows us to find the response of a linear circuit to multiple independent sources by summing the responses to each source acting alone?

A) Thevenin's Theorem B) Norton's Theorem C) Superposition Theorem D) Maximum Power Transfer Theorem

resistance inductance capacitance current voltage power energy units circuit laws kirchhoff network theorems - Online Test

Test Results