Ohm’s law Question: In any circuit current is inversely proportional to

Statement: In any circuit, current is inversely proportional to:

  1. Voltage
  2. Resistance
  3. Both of these
  4. 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.