Suppose we have a 100-volt battery connected with a 50-ohm heater coil. The current is then 100V/50Ω = 2 amps. The heater coil transforms the current into heat. How much power is needed by the circuit? If we double the voltage, what will the current be and how much power is being converted to electrical heat?

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Given v100volt I2 amps ... View the full answer