In a series R-C circuit, with the increase in frequency, current Increases
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 : 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 : 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 : State the need of multistage amplifier. Draw frequency response of R-C coupled amplifier.
Last Answer : The need of multistage amplifier The voltage (or power) gain, obtained from a single stage small signal amplifier, is limited. Therefore, it is not sufficient for all practical applications. Therefore, in ... to use a MULTISTAGE AMPLIFIER . Frequency response of R-C coupled amplifier.
Description : 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
Last Answer : 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 : 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 : 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 : 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 : 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 : The frequency of an alternating current is?
Last Answer : The frequency of an alternating current is the number of waves passing through a point in one second.
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 : 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 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.
Last Answer : For measuring current at high frequency we should use thermocouple instrument.
Description : Magnitude of current at resonance in R-L-C circuit?
Last Answer : The current will be maximum if it is a series rlc circuit.
Description : In a loss-free R-L-C circuit the transient current is?
Last Answer : In a loss-free R-L-C circuit the transient current is sinusoidal.
Description : The loop equation for a series RLC circuit gives
Last Answer : The loop equation for a series RLC circuit gives
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 : 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 a series circuit with unequal resistances?
Last Answer : In a series circuit with unequal resistances the highest resistance has the highest voltage drop.
Description : What is the direction of flow of electric current in an electric circuit?
Last Answer : It flows from anode to cathode (direction of holes flow)
Description : In an R-C phase shift oscillator, the minimum no. of R-C networks to be connected in cascade will be -
Last Answer : In an R-C phase shift oscillator, the minimum no. of R-C networks to be connected in cascade will be 3
Description : If the % reactance upto the fault point is 20%, then the short circuit current will be
Last Answer : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current
Description : In parallel RLC resonance circuit at resonance the current will be (1) Minimum (2) Maximum (3) Zero (4) Infinite
Last Answer : In parallel RLC resonance circuit at resonance the current will be Minimum
Description : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) (A) has q -axis current only (B) has d -axis current only (C) has both d and q axis currents (D) cannot be divided between q and d axis currents
Last Answer : The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only
Description : When one leg of parallel circuit is opened out the total current will?
Last Answer : When one leg of parallel circuit is opened out the total current will decrease.
Description : Electric current passing through the circuit produces?
Last Answer : Electric current passing through the circuit produces thermal effect.
Description : In which fault the maximum short circuit current occurs?
Last Answer : In three phase bolted fault the maximum short circuit occurs.
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 : For given applied voltage, with the increase in frequency of the applied voltage?
Last Answer : For given applied voltage, with the increase in frequency of the applied voltage eddy current loss will remain unchanged.
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 : In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will?
Last Answer : In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will be reduced by half.
Description : In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will?
Last Answer : In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will be doubled.
Description : Principal of digital frequency meter.
Last Answer : The basic block diagram of basic digital frequency meter (DFM) is shown in above figure. The signal whose frequency we have to be measured is first to be amplified through amplifier. The output of amplifier ... = Number of counts. t = Time interval between start and stop condition of the gate.
Description : Define the following terms: 1) Virtual height 2) Actual height 3) Critical frequency. 4) Maximum usable frequency.
Last Answer : 1) Virtual height:- The incident and refracted rays follow paths that are exactly the same as they have been if reflection had taken place from a surface located at a greater height, called ... angle of incidence is other than the normal is known as maximum unstable frequency. MUF= fc secθ
Description : Draw the diagram and explain the working of ferrodynamic type frequency meter.
Last Answer : Ferrodynamic type frequency meter: (Electrical resonance type frequency meter): It consists of a fixed coil. The supply whose frequency is to be measured is connected across it. This coil ... so selected that the moving coil takes up a convenient position when frequency is of normal value.
Description : List the different types of frequency meters.
Last Answer : Different types of frequency meters 1. Reed type [Mechanical type] 2. Ferro-dynamic type [Resonances type] 3. Weston type 4. Ratio-meter type 5. Saturable core type 6. Digital type
Description : Explain working of Weston type frequency meter.
Last Answer : Weston Type Frequency Meter: There are two fixed coils marked as A and B. Each coil divided into two equal parts and are fixed such that their magnetic axis are perpendicular to each ... leading to deflections in either direction depending on the currents there in, due to changed impedances.
Description : State the application of phase sequence indicator; clip on ammeter, frequency meter & P.F. meter.
Last Answer : Phase Sequence Indicator: 1. For finding correct phase sequence of supply 2. For obtaining exact instant of parallel operation of alternators. 3. For obtaining reversal of rotation ... 4. In electroplating industries 5. In various processes industries for measuring power factor
Description : List two types of oscillator, which generates frequency in RF range.
Last Answer : Types of Oscillators generating frequencies in RF range: i) Hartley Oscillator ii) Colpitt’s Oscillator iii) Clapp Oscillator
Description : Define: 1) frequency, 2) cycle, 3) time period, 4) amplitude
Last Answer : 1) frequency: The total number of cycles completed in one second is called frequency. Its unit is cycles per second or Hertz (Hz). Its formula is f = 1/ T, where T is time period. ... is second per cycle. 4) amplitude: the maximum instantaneous value of sine wave is called as amplitude.
Description : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Last Answer : A pulse radar has a pulse repetition frequency (PRF) of 3 KHz. If the radar is emitting at 10 GHz, what is the maximum unambiguous range for this radar? A) 5 Km B) 5 m C) 50 Km D) 15 m
Description : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is A) 7.5 m B) 7.5 Km C) 75 m D) 750 m
Last Answer : A pulse compression radar transmits an encoded pulse having a frequency chirp from 990 MHz to 1010 MHz centred around 1 GHz. The range resolution capability of this radar is 7.5 m
Description : What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... Current will be too much high (C) Transformer may start to smoke and burn (D) No effect
Last Answer : What would happen if a power transformer designed for operation on 50 Hz (frequency) were connected to a 500 Hz (frequency) source of the same voltage: (A) Eddy Current and Hysteresis losses will be ... will be too much high (C) Transformer may start to smoke and burn (D) No effect
Description : What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these
Last Answer : What is the frequency of an alternator which has 2 poles and makes 3600 revolutions per minute? A) 3600 HZ B) 60 Hz C) 120 Hz D) None of these
Description : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known
Last Answer : What happens to the voltage in the secondary when the frequency of the supply in the primary is decreased? A) It increases B) It decreases C) It remains the same D) Cannot say unless the actual percentage increase in the frequency is known