EE2201 Session 3 : Multiple Choice

What is the definition of a loop in an electrical circuit?

• A loop is an open path in a circuit where the starting point is different from the endpoint.

• A loop is any closed path in a circuit where the starting point and endpoint are the same node, and no other node is encountered more than once.

• A loop is a connection between two or more components where current can flow.

• A loop is a part of the circuit that only contains resistive elements.

Why are loops significant when applying Kirchhoff's Voltage Law (KVL)?

• They indicate the total resistance in the circuit.

• They are used to determine the power consumption in the circuit.

• They are essential for applying KVL as they are used to analyze the sum of the voltages around the loop.

• They help to identify the main current path in the circuit.

What is a node in an electrical circuit?

• A device that regulates voltage

• A component that stores electrical energy

• A point in a circuit where two or more circuit elements are connected

• A section of a circuit that does not consume power

Why are nodes important when applying Kirchhoff's Current Law (KCL)?

• Nodes allow for the calculation of the resistance in the circuit.

• Nodes are the points where the currents entering and leaving are analyzed, which is crucial for KCL.

• Nodes represent the physical layout of the circuit components.

• Nodes are used to determine the voltage levels in the circuit.

In a parallel circuit, why is the voltage across each component the same?

• Because the current through each component is the same

• Because the resistance of each component is the same

• Because the components are connected across the same two points

• Because the power dissipated by each component is the same

What does the constancy of voltage in a parallel circuit imply about the potential difference between two points?

• The potential difference depends on the total resistance of the circuit.

• The potential difference is independent of the path taken by the current.

• The potential difference varies with the number of components in the circuit.

• The potential difference equals the sum of the currents through each component.

What does Kirchhoff's Current Law (KCL) state?

• The sum of all voltages around a closed loop must equal zero.

• The sum of all currents entering a junction must be equal to the heat generated in the junction.

• The sum of all currents entering a junction (or node) must equal the sum of all currents leaving that junction.

• The resistance in a junction is directly proportional to the sum of currents entering it.

How is Kirchhoff's Current Law (KCL) applied in circuit analysis?

• By calculating the total resistance at a node

• By setting up equations that relate the currents at various nodes to determine unknown currents in a circuit

• By measuring the voltage drop across each component

• By finding the power dissipated in each component

What does Kirchhoff's Voltage Law (KVL) state?

• The total current in a closed loop must be conserved.

• The sum of all resistances in a closed loop must equal zero.

• The sum of all voltages around any closed loop in a circuit is equal to zero.

• The product of voltage and current in a closed loop must remain constant.

How is Kirchhoff's Voltage Law (KVL) used in circuit analysis?

• To measure the total current flowing through a loop

• To determine the power dissipated in each resistor

• To calculate the equivalent resistance of the loop

• To determine the unknown voltages in a circuit by setting up equations that relate the voltages around various loops