The diagram below shows a simple electrical circuit.
Which of the following would always increase the flow of current through the lights in the circuit shown above?
a
Decreasing the battery voltage and increasing the resistance of the lights.
b
Decreasing the battery voltage and decreasing the resistance of the lights.
c
Increasing the battery voltage and decreasing the resistance of the lights.
d
Increasing the battery voltage and increasing the resistance of the lights.
c - Increasing the battery voltage and decreasing the resistance of the lights.
The answer is c) Increasing the battery voltage and decreasing the resistance of the lights.
Increasing the battery voltage will provide more potential difference across the lights, which will increase the driving force pushing the electric charges through the circuit. Decreasing the resistance of the lights will allow more current to flow through them, as per Ohm's Law (V = IR). Therefore, both these actions will increase the flow of current through the lights in the circuit.