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
Description : If resistance is 20 Q. and inductance is 27 in a R-L series circuit, then time constant of this circuit will be?
Last Answer : 0.1s
Description : A DC voltage source is connected across a series RLC circuit. Under steady-state conditions, the applied DC voltage drops entirely across the
Last Answer : A DC voltage source is connected across a series RLC circuit. Under steady-state conditions, the applied DC voltage drops entirely across the C only
Description : 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?
Last Answer : 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? 7 V
Description : Source transformation Replace the circuit with voltage source in series with a single resistor
Last Answer : Source transformation Replace the circuit with voltage source in series with a single resistor
Description : Source free RL circuit 8
Last Answer : Source free RL circuit 8
Description : Source free RL circuit 7
Last Answer : Source free RL circuit 7
Description : Source free RL circuit 6
Last Answer : Source free RL circuit 6
Description : Source free RL circuit 1
Last Answer : Source free RL circuit 1
Description : Source free RL circuit 2
Last Answer : Source free RL circuit 2
Description : Source free RL circuit 3
Last Answer : Source free RL circuit 3
Last Answer : Source free RL circuit 4
Last Answer : Source free RL circuit 5
Description : Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across?
Last Answer : Two resistances Rl and Ri are connected in series across the voltage source where Rl>Ri. The largest drop will be across Rl.
Description : In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Last Answer : In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Description : At ______ frequencies the parallel R-L circuit behaves as purely resistive.
Last Answer : At very high frequencies the parallel R-L circuit behaves as purely resistive.
Description : 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
Last Answer : 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 500 Hz
Description : In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of?
Last Answer : In R-L-C series resonant circuit magnitude of resonance frequency can be changed by changing the value of L or C.
Description : The series and parallel resonance on L-C circuit differs in that?
Last Answer : The series and parallel resonance on L-C circuit differs in that series resistance needs a low-resistance source for sharp rise in current.
Description : In a series L-C circuit at the resonant frequency the?
Last Answer : In a series L-C circuit at the resonant frequency the current is maximum.
Description : In a series R-C circuit, with the increase in frequency, current (A) Reduces (B) Increases (C) Does not change (D) Becomes zero
Last Answer : In a series R-C circuit, with the increase in frequency, current Increases
Description : At very low frequencies a series R-C circuit behaves as almost purely?
Last Answer : At very low frequencies a series R-C circuit behaves as almost purely capacitive.
Description : The time constant of a series R-C circuit is given by?
Last Answer : The time constant of a series R-C circuit is given by RC.
Description : 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
Last Answer : An independent voltage source in series with an impedance ZS=R+jXS delivers a maximum average power to a load impedance ZL when ZL = R-jXS
Description : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero
Last Answer : Consider a circuit with four resistors in series connected to a voltage source. What happens to the voltage across each resistor, if the value of each of the resistors is doubled? A) It will double B) It will remain the same C) It will be halved D) It will become zero
Description : Series circuit rules
Last Answer : Series circuit rules
Description : Which of the following is true with a series circuit having resistors of different values? A) The total resistance of the circuit is the sum of the individual resistances B) The current across each ... ) The voltage drop across each resistor depends on the value of the resistor D) All the above
Last Answer : Which of the following is true with a series circuit having resistors of different values? A) The total resistance of the circuit is the sum of the individual resistances B) The current across ... voltage drop across each resistor depends on the value of the resistor D) All the above
Description : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value?
Last Answer : In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value will increase the selectivity of the circuit.
Description : In a series resonant circuit, the impedance of the circuit is?
Last Answer : In a series resonant circuit, the impedance of the circuit is minimum.
Description : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
Last Answer : The voltage appearing across the contacts after opening of the circuit breaker is called recovery voltage.
Description : The loop equation for a series RLC circuit gives
Last Answer : The loop equation for a series RLC circuit gives
Description : In a series RLC high Q circuit, the current peaks at a frequency (1) equal to the resonant frequency (2) greater than the resonant frequency (3) less than the resonant frequency (4) equal to half the resonant frequency
Last Answer : In a series RLC high Q circuit, the current peaks at a frequency equal to the resonant frequency
Description : In a series circuit with unequal resistances?
Last Answer : In a series circuit with unequal resistances the highest resistance has the highest voltage drop.
Description : A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Last Answer : A circuit that binds the upper or lower extreme of a waveform to a fixed DC voltage level is called ______ A) DC voltage restorer B) Clamping circuit C) Both A and B D) None of these
Description : Define : i) Average value ii) RMS value of an AC Wave.
Last Answer : i) Average value: The average value is defined as the average of all instantaneous values during one alternation . That is, the ratio of the sum of all considered instantaneous values to the ... as produced by the alternating current when flowing through the same resistance for the same time.
Description : RMS value formula
Last Answer : RMS value formula
Description : Define RMS value.
Last Answer : RMS Value of Sinusoidal AC Waveform: The RMS value is the Root Mean Square value. It is defined as the square root of the mean value of the squares of the alternating quantity over one cycle ... power or heat as is produced by the alternating current during the same time under the same conditions.
Description : Single-phase mid-point controlled rectifier with RL load
Last Answer : Single-phase mid-point controlled rectifier with RL load : The circuit configuration of single-phase midpoint controlled rectifier is shown in the figure. During positive half-cycle of ... some part of next positive half-cycle of voltage with reversed polarity can appear across load.
Description : The arc voltage in a circuit breaker is :
Last Answer : The arc voltage in a circuit breaker is : in phase with the arc current
Description : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field
Last Answer : An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field
Last Answer : The arc voltage produced in A.C. circuit breaker is always in phase with the arc current.
Last Answer : Req= (1/1200 +1/560 + 1/2.1)^-1 = 2.1 ohms RT= 2.1 + 7.8 = 9.9 ohms IT = V/R = 24/9.9 = 2.4 A Veq= R I = 2.1 2 ... 7.8 = 12.096 w = 44.928 w _________________________________________ By: Ellis-Junior Kamatjipose [email protected]
Description : What is the meaning of RMS value?
Last Answer : RMS value means root mean square value. It is 0.707 times peak value of voltage or current. The ammeter and voltmeter records this rms value. RMS value for sine wave is more than average value. RMS ... same amount of heat as produce by AC when AC is flowing through the same resistance for same time.
Description : The equation of 50 Hz current sine wave having r.m.s. value of 60 A is?
Last Answer : (60*√2)Sin(2π*50*t)
Description : The r.m.s. value of pure cosine function is?
Last Answer : 0.707 of peak value
Description : The r.m.s. value of a sinusoidal A.C. current is equal to its value at an angle of______degrees.
Last Answer : 45
Description : The r.m.s. value and mean value is the same in the case of?
Last Answer : The r.m.s. value and mean value is the same in the case of square wave.
Description : 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
Last Answer : In an AC circuit, the voltage across R, L and C are 30 V, 60 V and 20 V respectively. The applied voltage is 50 V
Description : How are the voltage drop across R and XL related in series RL circuit?
Last Answer : Voltage drop across a circuit is IZ, where I is current and Z isimpedance. In other words IZ = IR + jIX, where R is resistance andX is inductance
Description : Two 100W, 200V lamps are connected in series across a 200V supply. The total power consumed by each lamp will be in Watts
Last Answer : 4800