Question

question 10 of 25
the circuit diagram below shows the locations of four switches. all four switches are initially closed. which switch must be opened in order to create an open circuit?
a. switch 1
b. switch 3
c. switch 2
d. switch 4

Explanation:

Step1: Understand open - circuit concept

An open - circuit is one where the electrical path is broken, and no current can flow through the entire circuit.

Step2: Analyze each switch

If we open Switch 1, the path from the voltage source is broken and current cannot flow through the whole circuit. Opening Switch 2 will only isolate the parallel part with \(R_1\) and \(R_2\) from the voltage source, but the rest of the circuit can still have current. Opening Switch 3 or Switch 4 will only affect the current through \(R_1\) or \(R_2\) respectively in the parallel part, and the overall circuit can still be a closed - circuit.

Answer:

A. Switch 1