電與電路：练习题

In a simple series circuit, if one bulb blows out, what happens to the other bulbs in the circuit?

Study the circuit diagram below. What will happen to the remaining bulbs if bulb B2 is removed from its socket in a series circuit containing three identical bulbs?

Three identical resistors are connected in a parallel configuration across a DC voltage source. If one of the resistors suddenly develops an internal open circuit, how does the total current drawn from the voltage source change?

What is the primary function of a switch in an electrical circuit?

Which of the following materials is generally considered a good electrical conductor?

What type of material allows electrical current to flow through it easily?

A current of \(2 \ \text{A}\) flows through a circuit component with a resistance of \(5 \ \Omega\). What is the potential difference across the component?

Which component in a simple circuit is used to safely open or close the path of the current?

Part (a) What is the main function of a switch in an electric circuit?
Part (b) Describe what happens to the flow of current when the switch is opened.

Part (a) Compare series circuits and parallel circuits in terms of the number of current pathways.
Part (b) Two resistors of \(5\, \Omega\) and \(10\, \Omega\) are connected in series. Calculate the total equivalent resistance.
Part (c) If these same two resistors are connected in parallel, calculate their equivalent resistance.