If the resistance of a conductor is 30 ohm and the work done by the current is 18 joules in one minute, the voltage at both ends of the conductor is --- V, the current intensity through the conductor is --- a

If the resistance of a conductor is 30 ohm and the work done by the current is 18 joules in one minute, the voltage at both ends of the conductor is --- V, the current intensity through the conductor is --- a

3V 0.1A 6C is basically Ohm's law u = I * r; then there is power formula P = u * I; there are these two results, P = u ~ 2 / R (the square of u divided by R), then there is work w = P * t; w = (U ~ 2 / R) * t, @ in this problem, w = 18J, t = 60s, r = 30 ohm, u = 3V, I = u / r = 0.1A, electric quantity C = I * t

A light bulb is used in a household circuit with a voltage of 220 V. It takes 1 kW · h to light up 10 h. what is the current of this light bulb when it works?

It is known that: u = 220 & nbsp; V, t = 10h, then I = wut = 1 & nbsp; kW · h220 & nbsp; V × 10h ≈ 0.45a is obtained from the electric work formula w = Pt = uit, a: the current of this bulb is 0.45a

Physical meaning and physical definition of 1kW · H
The physical meaning is influence. The physical definition is to explain that the energy consumed by an electric appliance with 1kW power for one hour is 1kwh. Why is the physical meaning? Is this not an influence? I don't understand

It is incomprehensible to consume 1 kW of electric energy in one hour per unit time, because the physical meaning indicates that it is explained in terms of physical terms, so it can only be explained in this way. Although in some aspects, it can be said that it is an impact, there are limitations in the situation