Final answer:
The current in a 230V mains microwave with a power of 1000W is calculated by using the formula I = P/V. The resulting current is approximately 4.35 amperes (A).
Step-by-step explanation:
To calculate the current in a mains (230V) microwave that has a power of 1000W, you can use the power formula which is P = IV, where P is power in watts, I is current in amperes, and V is voltage in volts. Rearrange the formula to solve for I (current): I = P/V.
When you plug in the values you have: I = 1000W / 230V.
Performing the calculation gives: I = 4.35 amperes (A).
Therefore, the current in the microwave is approximately 4.35A.