Motors, Generators, and Source Ledgers

Generator Power Is Voltage Times Current

Generated voltage and load current produce an exact power ledger. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

Generated voltage and current make power

Generated voltage 4 volts and current 3 amperes make power 12 watts.

P=4×3=12 WP=4\times3=12\ \mathrm{W}
Magnetic powerGenerated voltage and current make power.V=4 VI=3 AP=12 WE=60 J

Power over time gives generated energy

Over 5 seconds, power 12 watts gives energy 60 joules.

E=12×5=60 JE=12\times5=60\ \mathrm{J}
Magnetic powerGenerated voltage and current make power.V=4 VI=3 AP=12 WE=60 J