What is the definition of electric power

What is the definition of electric power

Definition of electric power: the amount of work done by electric energy per unit time. It represents the speed of work done by electric current (electric field force), or the speed of electric energy consumption. Definition formula: P = w / T, calculation formula: P = UI

The definition and calculation formula of electric power
The definition formula of electric power is (), the calculation formula is (), and the commonly used calculation formulas are () and ()

The definition formula of electric power is (P = w / T), the calculation formula is (P = UI), and the commonly used calculation formulas are (P = I * 2R) and (P = u * 2 / R)

If the rated voltage of a DC motor is u, the rated power is p, and the internal resistance of the motor is r, then its current intensity in normal operation is
A. Equal to U / R B. greater than u / R C. equal to P / u D. greater than P / u
I know everything else, but I don't know how to exclude option B
The motor is a non pure resistance circuit. I know. Is I greater than u / R or less than u / R?

General non pure resistance circuit I is less than u / R
For the non pure resistance circuit, the total work is p = UI, which is divided into two parts, one part is used to do work (such as the mechanical work output by the motor), the other part is electrothermal, that is to say
P = UI = I ^ 2 * r + P output
So UI > I ^ 2 * r
That is u > IR, i

In the electric water heater of 220 V and 1100 W, if electric power is required, can we use 1100 w △ 220 V? My main question is whether w △ v = P is true?
Please ignore the question

The formula is wrong. The description of the electric water heater shows that the rated voltage U = 220 V, the rated power P = 1100 W, and the electric power is known as 1100 W
Electric power △ voltage = current!
Power is the speed of work per unit time. P = w △ t
Don't confuse concepts. You should have a good understanding of the definitions of these concepts in books