In the given figure , a series L-C-R circuit is connected to a variable frequency source of 230 V . The impedance and amplitude of the current at the resonating frequency will be A. `20 Omega` and 4.2 AB. `30 Omega` and 6.9 AC. `25 Omega` and 5.8 AD. `40 Omega` and 5.75 A

In the given figure , a series L-C-R circuit is connected to a variabl

1.	In the given figure , a series L-C-R circuit is connected to a variable frequency source of 230 V . The impedance and amplitude of the current at the resonating frequency will be A. `20 Omega` and 4.2 AB. `30 Omega` and 6.9 AC. `25 Omega` and 5.8 AD. `40 Omega` and 5.75 A
Answer» Correct Answer - D At resonance , `underset(L)(X)` = `underset(C )(X)` `therefore` Z = R = 40`Omega` `underset(rms)(I)` = `underset(rms)(V)` / Z = 5.75 A

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In the given figure , a series L-C-R circuit is connected to a variable frequency source of 230 V . The impedance and amplitude of the current at the resonating frequency will be A. `20 Omega` and 4.2 AB. `30 Omega` and 6.9 AC. `25 Omega` and 5.8 AD. `40 Omega` and 5.75 A

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