Physics for IGCSE & O level - Electricity (Section 5 - No. 49)
What happens to the current in a wire if the voltage is doubled and the resistance is halved?
The current remains the same.
The current doubles.
The current quadruples.
The current halves.
คำอธิบาย
Since current = Voltage/Resistance, doubling voltage and halving resistance quadruples current