How much electricity does a student need to cook porridge once?
The power of electric cookers is generally 400-1500 w.
If the target power is 400w, it is 400w per hour. 1 kwh is 1000w, and it usually takes 40min to cook porridge. Calculated by 400 ~ 1500 W, 40min is 233 W ~ 1000 W, which is close to 1 kWh. The longer the time, the greater the power consumption.