# In an R-C-L series circuit, during resonance, the impedance will be _____.

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In an R-C-L series circuit, during resonance, the impedance will be minimum.

## Related questions

In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of?

If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be?

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In an ac series RLC circuit, the voltage across R and L is 20 V; voltage across L and C is 9 V and voltage across RLC is 15 V. What is the voltage across C?

The series and parallel resonance on L-C circuit differs in that?

Magnitude of current at resonance in R-L-C circuit?

A series R-L circuit is suddenly connected to d.c. voltage source of V volts. The current in this series circuit, just after the switch is closed, is equal to (1) Zero (2) V/L (3) V/C (4) V.L/C

In an AC circuit, the voltage across R, L and C are 30 V, 60 V and 20 V respectively. The applied voltage is (A) 70 V (B) 50 V (C) 60 V (D) 100 V

A series R-L-C Circuit has a resonant frequency of 1000 Hz. If the values of R, L and C are doubled, the new resonant frequency is

A series RLC circuit has a resonant frequency of 1 KHz and a quality factor Q = 100. If each of the R,L and C is doubled from its original value, the new Q of the circuit is:  (1) 25 (2) 50 (3) 100 (4) 200

In an R-C phase shift oscillator, the minimum no. of R-C networks to be connected in cascade will be -

What is the RMS voltage in a series RL circuit, if the voltage across R and L is 256 V and 192 V respectively? A) 320 V B) 448 V C) 64 V D) None of these

A parallel combination of capacitance C and resistance R is connected in series with inductance L and small resistance r. Under what condition will the circuit be non-reactive?  (A) C=LR (B) C=LR2 (C) C=L/R2 (D) C=L/R

An R-L series AC circuit has R = 10 ohm and XL = 10 ohm. It is connected to an AC voltage source, the phase angle between voltage and current is (a) 30° (b) 45° (c) 60° (d) 36.8°

In a loss-free R-L-C circuit the transient current is?

Draw a circuit diagram of R.C. series circuit. Draw impedance triangle and power triangle for same circuit.

In a series L-C circuit at the resonant frequency the?

In a R-L-C circuit?

In a circuit containing R, L and C, power loss can take place in?

An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when A) ZL = R B) ZL = jXS C) ZL = R-jXS D) ZL = R+jXS

In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero

Which of the following statements is incorrect? A) During parallel resonance impedance at resonance is minimum B) During parallel resonance current is magnified C) During series resonance current at resonance is maximum D) During series as well as parallel resonance, the power factor is unity

A 50Ω transmission line is terminated in an impedance of 20-j50. What will be the reflection coefficient? A) 0.69 B) 1.69 C) 6.9 D) 16.9

A step voltage E is applied to a series R-L circuit. The rate of change of current is maximum at t = _:  (1) Zero (2) Infinity (3) L/R (4) R/L

In a d.c. series motor, the torque developed is 20 Nm at 10A. If the load current is doubled, the new torque will be : -  a) 60 Nm b) 45 Nm c) 80 Nm d) 100 Nm

For a series R -C circuit, the power factor corresponding to maximum power is (a) 0-5 lag (b) 0.5 lead (c) 0.707 lag (d) 0-707 lead

The time constant of a series R-C circuit is given by?

A series RLC circuit resonate at 200 Hz. If the capacitance is increased to four times, the circuit will be in resonance at   (a) 100 Hz (b) 200 Hz (c) 400 Hz (d) 800 Hz

In parallel RLC resonance circuit at resonance the current will be  (1) Minimum (2) Maximum (3) Zero (4) Infinite

Impulse response of an R–L circuit is a : (A) Rising exponential function (B) Decaying exponential function (C) Step function (D) Parabolic function

The transient current in lossless L-C circuit when excited from an AC source is, sine wave  (a) Critically damped (b) Underdamped (c) Overdamped (d) Undamped

At very low frequencies a series R-C circuit behaves as almost purely?

In a series RLC circuit at resonance, which of the following quantities attains maximum value ? (A) Current (B) Voltage (C) Power (D) None of the above

A ramp voltage V(t)=100 V is applied to an RC differentiating circuit with R=5 kΩ and C=4 μF. The maximum output voltage is  (A) 0.2 V (B) 2 V (C) 10 V (D) 50 V

In a series resonant circuit, the impedance of the circuit is?

in Series LCR circuit, at resonance:  (1) Current is maximum and power factor is zero (2) Current is maximum and power factor is unity (3) Current is minimum and power factor is unity (4) None of these

Resonance occurs in RLC series circuit when  A) When the supply voltage and current are in phase B) When inductive reactance become equal to capacitive reactance C) When voltage across the inductor become equal to the voltage across the capacitor D) All of the above

A diode D, resistor R and inductor L and a switch S are connected in series.When a voltage V is applied across the circuit and switch is put on, the voltage across L changes as  A) V(1-exp(-t R/L)) B) Vexp(-t R/L) C) Ldi/dt +Ri D) V(1-t R/L)

In a series resonant circuit, maximum voltage across L occurs at  (a) Resonant frequency (b) Slightly below resonant frequency (c) Slightly above resonant frequency (d) At a frequency where I is maximum

During 3-phase short circuit on a unloaded alternator, the dc component may be zero in (1) One phase only (2) Any two phases (3) All three phases (4) None of the above

At ______ frequencies the parallel R-L circuit behaves as purely resistive.