AC Fundamentals, Circuit and Circuit Theory
In a R-L-C circuit

Power is consumed in resistance and is equal to IR
All of the listed here
Exchange of power takes place between inductor and supply line
Exchange of power takes place between capacitor and supply line

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AC Fundamentals, Circuit and Circuit Theory
The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

None of the listed here
Both waves must have zero value at the same time
Both waves must have same frequency
Both waves must have identical peak values

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