The potential difference between the terminals of an electric heater is 80 V when it draws a current of 8 A from the source. What current will the heater draw if the potential difference is increased 100 V?

Electric Heater Current Calculation

Given:

• Initial voltage, V₁ = 80 V
• Initial current, I₁ = 8 A
• New voltage, V₂ = 100 V
• New current, I₂ = ?

Step 1: Calculate the resistance of the heater

Using Ohm’s Law: R = V / I

R = V₁ / I₁ = 80 V / 8 A = 10 Ω

Step 2: Calculate the new current drawn at 100 V

Since the resistance remains the same, use Ohm’s Law again:

I₂ = V₂ / R = 100 V / 10 Ω = 10 A

Final Answer:

The heater will draw a current of 10 A when the potential difference is increased to 100 V.