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PARALLEL RESONANCE

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When a circuit consisting of two or more branches in pain resonance, the overall power factor, lie that in a sericircuit is unit!" #nlie a series circuit, however, the total

current $fee%ing& all branches is a minimum because thealgebraic sum of the 'ua%ratic components of current isthis implies, of course, that the total current is in phase the voltage, as it shoul% be when the power factor is unterm antiresonance is sometimes use% for unit!+power fparallel circuits to %istinguish it from a similar con%ition series circuits"ormula-

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CONS*R#C*/ON

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PRO0LE1S

2" An impe%ance coil having a resistaof 34 ohms an% an in%uctance of 35mconnecte% in parallel with a variable

capacitor" or what value of C will thecircuit be resonant if a 75+volt source8556( is applie%9

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PRO0LE1S

3" An impe%ance coil having a resistaof 34 ohms an% an in%uctance of 35mconnecte% in parallel with a :4u

capacitor" or what value of fwill thecircuit be resonant if a 75+volt sourceapplie%9

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PRO0LE1S

;" Calculate the resonantfre'uenc! of a 3+branch parall

circuit given the followingparticulars- Rl < ;5 ohms, Rc