Question: A dc machine has 6 poles all connected in series. Each pole has 9 H inductance and field current is 2 A. Total inductance and total energy stored are [A]. 9 H and 18 J [B]. 18 H and…
Question: A series resonant circuit has R = 2 Ω, L = 0.1 H and C =10 μF. At resonance applied voltage = 10 ∠0 V. Voltage across inductance is likely to be [A]. 10 ∠0 V [B]. 10 ∠45°…
Question: A two branch parallel tuned circuits has a coil of resistance R and inductance L in one branch and capacitance C in the second branch. The bandwidth is 200 radians/sec. A load of resistance RL is connected in parallel.…
Question: A wave trap is a [A]. series tuned circuit [B]. a parallel tuned circuit [C]. either a series tuned circuit or parallel tuned circuit [D]. none of the above Answer: Option B Explanation: It has R and L in…
Question: A resistance R, inductance L and capacitance C are in series. The source frequency is adjusted to be equal to resonant frequency. The lower half power frequency is ω1. Another resistance R is added in series with the circuit.…
Question: A coil of resistance R and inductance L has a capacitor C in parallel with it. The source frequency is adjusted to a value equal to resonant frequency. Another capacitor C is added in parallel with the above circuit,…
Question: A two branch parallel resonant circuit has a coil of resistance R and inductance L, in one branch and a capacitors C in the other branch. The source voltage is V, At resonance the circulating current is [A]. [B].…
Question: A coil of resistance R and inductance L is connected in series with 5 μF capacitor. The source frequency is equal to resonance frequency and circuit current is 0.5 A. Another 5 F capacitor is connected in parallel with…
Question: A coil of resistance R and inductance L is connected in series with 10 mF capacitor. The resonant frequency is 1000 Hz. Another 10 F capacitor is connected in parallel with the above capacitor. The new resonance frequency will…
Question: A series resonant circuit has inductance L. If L is increased, the resonant frequency [A]. increases [B]. decreases [C]. remains constant [D]. may increases or decreases Answer: Option B Explanation: . As L increases ωr decreases.