4
QuizMultiple Choice

Electric Circuits — Quiz

Question 4 • Physics

The cause of a fire in a computer is described as an incorrectly wired circuit. Which statement best explains the likely cause of the fire?

Answer
A
The wiring contained a closed circuit, so the current was redirected around the components that would have provided the proper resistance.
B
The wiring contained an open circuit, so the reduced resistance caused an increase in current.
C
The wiring contained a short circuit, so the reduced resistance caused an increase in current.
D
The wiring contained an open circuit, so the current was redirected around the components that would have provided the proper resistance.

Explanation

A short circuit creates an unintended path with very little resistance. By Ohm’s law, lower resistance allows more current to flow, and the excessive current can generate enough heat to start a fire. An open circuit interrupts the current rather than increasing it, so choice B, “the wiring contained a short circuit,” best explains the fire.

AI-written and checked against the verified answer.

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