Quiz for Kirchoff’s rules

Q1: Kirchhoff’s first law is based on which principle?

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

Q2: Kirchhoff’s second law is based on which principle?

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

Q3: What is the sum of currents entering a junction according to KCL?

A. Zero B. Maximum C. Equal to sum leaving D. Infinity

Q4: What is the sum of potential differences in a closed loop, as per KVL?

A. Always zero B. Always positive C. Always negative D. Depends on loop

Q5: Which of the following violates Kirchhoff’s laws?

A. Time-varying magnetic fields B. Closed loop circuits C. Battery-powered circuits D. Resistor-only circuits

Q6: In KVL, what is the sign of potential drop across a resistor in the direction of current?

A. Positive B. Negative C. Zero D. Can’t be determined

Q7: What is a junction in an electrical circuit?

A. A point where voltage changes B. A point of infinite resistance C. A point where three or more conductors meet D. A point of open circuit

Q8: If 2 A enters a junction and 1.5 A leaves, how much current must enter or leave further?

A. 0.5 A must leave B. 0.5 A must enter C. 2 A must leave D. 1 A must enter

Q9: KVL fails in circuits containing:

A. Inductors B. Capacitors C. Time-varying magnetic flux D. Resistors

Q10: Which is true for a circuit loop according to KVL?

A. Sum of voltage drops = net emf B. Current is conserved C. Power is zero D. Voltage remains constant

Q11: In which situation is KCL not valid?

A. Open circuit B. Closed loop C. Charge accumulation at a junction D. Balanced bridge

Q12: KVL equation consists of which physical quantity?

A. Current B. Voltage C. Charge D. Resistance

Q13: Current flowing through a resistor follows which law?

A. Faraday’s law B. Coulomb’s law C. Kirchhoff’s laws D. Ohm’s law

Q14: Kirchhoff’s laws are applicable in which circuit?

A. Only AC circuits B. Only DC circuits C. Only ideal circuits D. Both AC and DC circuits

Q15: In a balanced Wheatstone bridge, current through the galvanometer is:

A. Maximum B. Zero C. Infinite D. Minimum

Q16: Unit of electromotive force (emf) is:

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

Q17: If in a loop, you move opposite to current direction across a resistor, potential change is:

A. Positive B. Negative C. Zero D. Infinite

Q18: Kirchhoff’s laws are derived from which fundamental laws?

A. Newton’s laws B. Maxwell’s equations C. Conservation laws D. Laws of thermodynamics

Q19: To apply KVL, we must consider:

A. All voltage gains and drops B. Only resistors C. Only batteries D. Only emf

Q20: If net emf in a loop is 10 V and voltage drops sum to 10 V, net voltage is:

A. Zero B. 5 V C. 10 V D. 1 V