An electric heater is rated at 800 W . If the supply voltage is 200 V . What is the current rating?

Correct option is B

Correct Answer: B. 4 A

Explanation:

• Using the power formula:

P=V×I

• Given P=800 W,and V=200 V, current I is:

​$$\frac{P}{V} = \frac{800}{200} = 4\, A$$​​

• Power rating indicates the amount of power the heater consumes.
• Current rating is crucial for selecting the right fuse or circuit breaker.