What is the energy consumption of a 400W electric appliance in 2 hours?

What is the energy consumption of a 400W electric appliance in 2 hours?

It's very simple. 0.4KW x 2H = 0.8kw · H

What is the power of an electric appliance?

Power is equal to the voltage at both ends of the consumer multiplied by the current flowing through the consumer

How to make electric appliances work
Why is the more batteries in the circuit, the brighter the lamp is, and why is the battery dead? Why is the voltage of branch circuit lower than that of trunk circuit in parallel circuit

1. The more batteries in series, the higher the voltage, and the constant resistance of the bulb, so the greater the current in the circuit, the brighter the bulb
2. In general, the chemical energy generated by chemical reaction is converted into electric energy inside the battery, but the material is limited. When the material reaction is finished, there will be no chemical change, so there will be no energy conversion, showing no electricity
3. In parallel circuit, the voltage of branch circuit and main circuit is equal, and the series circuit depends on the resistance of each component

What kind of electrical appliances can 1 kilowatt hour supply work for 25 hours

A 40W electric lamp, electric fan, etc