Ohm’s law Question: In any circuit current is inversely proportional to
Statement: In any circuit, current is inversely proportional to:
- Both of these
- None of these
Correct answer: Voltage
In any circuit, the current is inversely proportional to resistance and directly proportional to applied voltage. The statement about is based on the definition of Ohm’s law.
From mathematical formula V = IR:
Current = Voltage / Resistance
Let’s consider voltage is constant having value 20 V.
Now for the resistance of 10 ohms
Current = 20 V / 10 ohms = 2 A … (1)
Let’s now increase the resistance to 30 ohms
Current = 20 V / 30 ohms = 0.66 A … (2)
Comparing both equations we observe the higher value of resistance lowers the electric current through a circuit.