Question

write different formulas to find electrical energy​

Answer 1

Electrical energy is the product of power multiplied by the length of time it was consumed. So if we know how much power, in Watts is being consumed and the time, in seconds for which it is used, we can find the total energy used in watt-seconds. In other words, Energy = power x time and Power = voltage x current.

To find the Voltage, ( V )

[ V = I x R ] V (volts) = I (amps) x R (Ω)

To find the Current, ( I )

[ I = V ÷ R ] I (amps) = V (volts) ÷ R (Ω)

To find the Resistance, ( R )

[ R = V ÷ I ] R (Ω) = V (volts) ÷ I (amps)

To find the Power (P)

[ P = V x I ] P (watts) = V (volts) x I (amps)

Also:

[ P = V2 ÷ R ] P (watts) = V2 (volts) ÷ R (Ω)

Also:

[ P = I2 x R ] P (watts) = I2 (amps) x R (Ω)

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Answer 2

Electric energy = electric power × time = P × t. Thus the formula for electric energy is given by: Electric energy = P × t = V × I × t = I2 × R × t = V2t / R.

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