Question: A series resonant circuit has R = 10 Ω, L = 1 μH and C = 1 mF. If R is increased to 20 Ω the resonant frequency [A]. increases [B]. decreases [C]. remains constant [D]. may increases or…

Question: A two branch parallel tuned circuit has a capacitance C in one of the two branches and resistance R in second branchs. As C is decreased the dynamic resistance [A]. increases [B]. decreases [C]. remains constant [D]. may increases…

Question: A two branch tuned circuit has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. If R is increased, the dynamic resistance [A]. decreases [B]. increases [C]. remains constant [D].…

Question: In a series resonant circuit Q is more than 10. Then the lower half power frequency ω1, and resonant frequency ω0 are related as [A]. ω1 = ω0 + bandwidth [B]. ω1 = ω0 + 0.5 (bandwidth) [C]. ω1…

Question: A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency is [A]. 100 rad/sec [B]. 10000 rad/sec [C].…

Question: A two branch parallel tuned circuit has a coil of resistance 100 Ω and inductance 0.005 H in one branch and 10 nF capacitor in the second branch. At resonance frequency, the dynamic resistance is [A]. 1 Ω [B].…

Question: A two branch parallel tuned circuit has 100 Ω resistance and 0.1 H inductance in one branch and 10-6 F capacitor in the other. At resonance frequency, the dynamic resistance is [A]. 10 Ω [B]. 100 Ω [C]. 1000…

Question: In figure, the magnitude of V [A]. must be more than that of Va [B]. must be more than that of Vb [C]. must be more than that of Va or Vb [D]. can be equal to or less…

Question: In figure, the current I4 is [A]. 10 ∠0 [B]. 5 ∠90° [C]. 5 ∠270° [D]. 10 ∠90° Answer: Option B Explanation: I4 = I1 + I2 + I3 or I4 = 5∠90° + 5∠0 + 5∠180° = 5∠90°.

Question: In a series ac circuit a voltage of 20 V at 25 Hz causes a current of 0.20 A, while the same voltage at 75 Hz causes a current of 0.12 A. The circuit consists of [A]. R and…