Kirchhoff’s Laws
Physics ⇒ Electricity and Magnetism
Kirchhoff’s Laws starts at 11 and continues till grade 12.
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A circuit has two loops and three junctions. How many independent equations can you write using Kirchhoff’s Laws?
Describe a situation where the application of Kirchhoff’s Laws is necessary to solve a circuit.
Describe the steps involved in solving a circuit using Kirchhoff’s Laws.
Explain why Kirchhoff’s Laws may not be valid in the presence of a time-varying magnetic field.
A circuit has three resistors (2 Ω, 3 Ω, 5 Ω) in series with a 10 V battery. Using KVL, calculate the current in the circuit.
A circuit has two batteries (6 V and 4 V) and two resistors (2 Ω and 3 Ω) in series. What is the current in the circuit?
A circuit has two loops and three junctions. How many independent equations can you write using Kirchhoff’s Laws?
A circuit loop contains a 12 V battery and three resistors (2 Ω, 4 Ω, and 6 Ω) in series. Using KVL, what is the voltage drop across the 4 Ω resistor if the current is the same through all resistors?
In a circuit, if the sum of currents entering a node is not zero, what does this indicate? (1) The circuit is open. (2) Charge is not conserved. (3) There is a measurement error. (4) The circuit is in equilibrium.
Which of the following is a correct application of KCL? (1) At a node, 2 A enters and 3 A leaves, so 1 A must enter. (2) At a node, 4 A enters and 4 A leaves, so the node is balanced. (3) At a node, 5 A enters and 2 A leaves, so 3 A must leave. (4) All of the above.
Which of the following is NOT a limitation of Kirchhoff’s Laws? (1) They are not valid for time-varying magnetic fields. (2) They cannot be used for circuits with more than two loops. (3) They assume lumped circuit elements. (4) They are based on conservation laws.
Which of the following is NOT required when applying Kirchhoff’s Laws? (1) Assigning current directions (2) Labeling all elements (3) Knowing the value of all resistors (4) Writing equations for each loop and junction
Fill in the blank: According to Kirchhoff’s Current Law, the algebraic sum of currents at a node is _______.
Fill in the blank: In a parallel circuit, the voltage across each branch is _______.
Fill in the blank: In a series circuit, the current through each resistor is _______.
Fill in the blank: Kirchhoff’s Voltage Law is a consequence of the law of conservation of _______.
A closed loop in a circuit contains three resistors and a battery. The voltage drops across the resistors are 2 V, 3 V, and 4 V. If the battery supplies 9 V, does the loop satisfy Kirchhoff’s Voltage Law?
True or False: Kirchhoff’s Laws are only applicable to linear circuits.
True or False: Kirchhoff’s Laws can be applied to both DC and AC circuits.
True or False: Kirchhoff’s Voltage Law is based on the law of conservation of energy.
