Lesson 10

What is the primary characteristic of a parallel circuit that differentiates it from a series circuit?

• The current is the same through all components.

• The voltage is the same across all components.

• The resistance is the same across all components.

• The power is the same across all components.

Which of the following materials is essential for constructing a parallel circuit?

• Capacitors

• Inductors

• Resistors

• Transformers

If a parallel circuit has three resistors with values of 4 Ω, 6 Ω, and 12 Ω, what is the total resistance of the circuit?

• 2 Ω

• 3 Ω

• 4 Ω

• 5 Ω

In a parallel circuit, if one lightbulb burns out, what happens to the other lightbulbs?

• They all go out.

• They become dimmer.

• They remain lit.

• They become brighter.

How does adding more branches with resistors in a parallel circuit affect the total current flowing through the circuit?

• It decreases the total current.

• It increases the total current.

• It has no effect on the total current.

• It decreases the total voltage.

Explain why parallel circuits are often used in household wiring systems.

• They are cheaper to install.

• They allow devices to operate independently.

• They require less maintenance.

• They use less energy.

A parallel circuit has a total current of 6 A and three branches with currents of 2 A, 2 A, and 2 A. If one branch is removed, what will be the new total current?

• 2 A

• 4 A

• 6 A

• 8 A

Which instrument is used to measure the current flowing through a branch of a parallel circuit?

• Voltmeter

• Ammeter

• Ohmmeter

• Multimeter

Design a simple parallel circuit using two resistors and a battery. Explain the steps and reasoning behind your design.

• Connect resistors in series with the battery.

• Connect resistors in parallel with the battery.

• Connect one resistor in series and one in parallel with the battery.

• Connect resistors in parallel with each other and in series with the battery.

What happens to the total resistance of a parallel circuit if more resistors are added?

• It increases.

• It decreases.

• It remains the same.

• It doubles.