Question

A microwave oven has a power of 1800 W and the potential difference applied from the mains is 230 V. What are its current and resistance?

Answer 1

I = 7.826A

R = 29.38 Ω

Step-by-step explanation:

First, let us find the current of the microwave.

Let us use the below formula for that.

Power = Voltage × Current

Current = Power ÷ Voltage

= 1800w ÷ 230v

= 7.826 A

And now let us find the resistance using the below formula.

Voltage = Current × Resistance

Resistance = Voltage ÷ Current

= 230V ÷ 7.826A

= 29.38 Ω