Question

A bulb filament has a resistance of 1200 ohms. It is connected to a 220 V power supply. How much current will it draw?

• A. 12 Ampere
• B. 2.8 Ampere
• C. 2 Ampere
• D. 0.18 Ampere

Hint:

Ohm’s Law (\( V = IR \)) helps determine current when voltage and resistance are known.

Answer 1

The Correct Option is D

Step 1: Using Ohm’s Law. Ohm’s Law states: \[ V = IR \] where - \( V = 220V \) (voltage), - \( R = 1200 \Omega \) (resistance), - \( I \) (current) needs to be found.
Step 2: Calculating current. \[ I = \frac{V}{R} = \frac{220}{1200} = 0.18 \text{ A} \]
Step 3: Explanation of incorrect options.
- 12 A, 2.8 A, and 2 A are incorrect as they do not match the correct calculation.