Kirchhoff's Laws Intermediate Quiz

In the circuit with the variable resistor R, what is the purpose of adjusting R until the current measured by the ammeter is zero?

Kirchhoff's laws can be used to determine the current in a circuit with multiple loops and branches.

What are the two primary laws used in Kirchhoff's laws to analyze circuits?

In the circuit with the open switch S, the current measured by the ammeter is 0.25 A. This value represents the ______ of the cell.

Match the following terms with their corresponding descriptions:

Kirchhoff's first law states that the algebraic sum of currents entering a junction in an electrical circuit is equal to the algebraic sum of currents ______ the junction.

What is the name of the quantity conserved by Kirchhoff's first law?

In a circuit with two branches, one with a current of 2.0 A and the other with a current of 1.5 A, what is the total current entering the junction?

Which of the following combinations of cells with an e.m.f. of 1.5 V each will result in a total e.m.f. of 4.5 V?

Kirchhoff's second law states that the sum of the potential drops across all the components in a closed loop is equal to the sum of the e.m.f.s in the loop.

Calculate the current I in a circuit with a 10 Ω resistor and a 6.0 V battery using Kirchhoff's second law.

In a parallel circuit, the ______ across each branch is the same.

Match the following terms with their definitions:

What are the two main methods for determining the electromotive force (e.m.f.) of a cell?

In the experiment described, increasing the e.m.f. of the supply (Es) will always result in a higher current (I) in the circuit.

According to Kirchhoff's second law, the sum of the ______ in a closed loop is equal to the sum of the ______ in that loop.

In determining the circuit current (I) in Example 2, the equation Σ e.m.f. = Σ p.d. is applied. What does Σ p.d. represent?

In a series circuit, the value of current is always the same due to conservation of charge.

What is the unit of measurement for electromotive force (e.m.f.)?

Kirchhoff's ______ law states that the algebraic sum of the currents entering a junction is equal to the algebraic sum of the currents leaving the junction.

In Example 1, applying Kirchhoff's first law to point Y gives us:

In Example 2, the 0.90 V cell is considered 'reversed' because it is connected in the opposite direction to the other cells.

What is the purpose of Kirchhoff's laws in the context of electrical circuits?

In the first circuit, which direction does the current flow through resistor C?

In the first circuit, calculate the total resistance of the two resistors in parallel.

Kirchhoff's first law states that the ______ of currents entering a junction equals the ______ of currents leaving the junction.

In the first circuit, the current through resistor D is 0.35 A.

In the second circuit, what is the value of the electromotive force (e.m.f.) for the circuit loop containing the 100 Ω resistor?

Match the following descriptions with the corresponding physical concepts:

Kirchhoff's second law is based on the principle of ______ of energy.

In the second circuit, what is the current I2?

What is the purpose of adjusting the variable resistor R in a circuit until the current measured by the ammeter is zero?

In a series circuit, the current is the same throughout the circuit.

What is the value of the current I in the circuit with the clockwise loop? (Refer to the circuit diagram in the content)

How is Kirchhoff's first law used to determine the current I3 in the circuit with two loops?

With the switch open in the circuit with the parallel combination, the total resistance of the parallel combination is calculated as ______ Ω.

What is the value of the electromotive force (EMF) E in the circuit with the switch closed? (Refer to the circuit diagram in the content)

What is the purpose of the 100 Ω resistor in the circuit?

According to Kirchhoff's second law, the sum of the electromotive forces (EMFs) in a closed loop is equal to the sum of the potential drops across the components in that loop.

What is the relationship between the e.m.f. of the supply (Es) and the e.m.f. of the cell (Ecell) when the current (I) in the circuit is zero?

In the provided circuit, the direction of the current is determined by the relative magnitudes of the _____.

Match each term with its corresponding definition:

Which of the following is NOT a sensible safety precaution when working with mains-operated supplies?

What is the purpose of plotting a graph of I against Es in this experiment?

The uncertainty in the e.m.f. value obtained from the graph is directly proportional to the slope of the best fit line.