Question

cumulative exam
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a component of a circuit changes, as shown below. how would this change affect the electric circuit?
a switch is closed, so the circuit would be
incomplete and broken and the lights in the circuit
would not shine.
a switch is closed so the circuit would be complete
and unbroken and the lights in the circuit would
shine
a switch is opened, so the circuit would be
incomplete and broken and the lights in the circuit
would not shine
a switch is opened, so the circuit would be complete
and unbroken and the lights in the circuit would
shine

Explanation:

In a circuit, a closed switch connects the circuit, making it complete (unbroken), allowing current to flow so lights shine. The diagram shows a switch going from open to closed. Option A says closed makes circuit incomplete (wrong). Option C and D say switch is opened (wrong, diagram shows closing). So the correct reasoning is a closed switch completes the circuit for lights to shine.

Answer:

B. A switch is closed, so the circuit would be complete and unbroken and the lights in the circuit would shine