Kirchhoff's Laws Practice
10 problems · instant feedback · full explanations
KCL: current in = current out at every junction (charge conservation). KVL: voltage drops around any closed loop sum to zero (energy conservation).
Q1.
Kirchhoff's current law (junction rule) expresses conservation of:
Multiple choice · Easy
Q2.
Kirchhoff's voltage law (loop rule) states:
Multiple choice · Easy
Q3.
Currents of 2 A and 3 A enter a junction; one wire leaves. What current leaves?
Numerical answer (A) · Medium
Q4.
A 12 V battery drives 4 Ω and 2 Ω resistors in series. What is the current? (A)
Numerical answer (A) · Medium
Q5.
In the same circuit, what is the voltage drop across the 4 Ω resistor?
Numerical answer (V) · Medium
Q6.
A 12 V battery connects to 6 Ω and 3 Ω resistors in parallel. What total current leaves the battery?
Multiple choice · Hard
Q7.
In a balanced Wheatstone bridge, the current through the middle branch is:
Multiple choice · Hard
Q8.
Kirchhoff's current law holds at every instant, even in circuits with charging capacitors.
True / False · Easy
Q9.
Kirchhoff's voltage law holds exactly even when a changing magnetic field threads the loop.
True / False · Medium
Q10.
The reliable method for a two-loop circuit with two batteries is:
Multiple choice · Hard