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Answer:
The formula of Joule Law
A quantitative form of Joule's law is that the heat evolved per second, or the electric power loss, P, equals the current I squared times the resistance R, or P = I2R. The power P has units of watts, or joules per second, when the current is expressed in amperes and the resistance in ohms.
The formula of Energy
The formula for the energy is KE = .5 × m × v2 where KE is kinetic energy in joules, m is mass in kilograms and v is velocity in meters per second.
The formula of Power
Ohm's law equation (formula): V = I × R and the power law equation (formula): P = I × V. P = power, I or J = Latin: influare, international ampere, or intensity and R = resistance. V = voltage, electric potential difference Δ V or E = electromotive force (emf = voltage).
The formula of Current I
Electric Current Formula and Unit
If a charge Q flows through the cross-section of a conductor in time t, the current I then I=Q/t. The S.I unit of charge is coulomb and measurement of electric current happens in units of coulomb per second which is 'ampere'.
Value of kWh.
One kilowatt-hour is equal to 3600000 joules: 1kWh = 3600000J = 3.6⋅106J = 3.6MJ. So the energy in joules E(J) is equal to 3600000 times the energy in kilowatt-hour E(kWh): E(J) = 3600000 ⋅ E(kWh)
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