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Is vdr only applicable on series circuit
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Yes because in parallel circuit voltage remain same for all the loads
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Description :

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

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.

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Description :

In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR in another phase, results in (A) voltage notching (B) harmonic distortion (C) voltage sag (D) voltage swell

Answer :

In a 3-phase converter circuit during commutation when one SCR in one phase is turned on to turn-off an SCR in another phase, results in voltage notching

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138 views 1 answer
Description :

The loop equation for a series RLC circuit gives

Answer :

The loop equation for a series RLC circuit gives

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Answer :

Source transformation Replace the circuit with voltage source in series with a single resistor

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Description :

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]

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Description :

Series circuit rules

Answer :

Series circuit rules

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Description :

Define magnetic circuit. Draw simple series magnetic circuit.

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Description :

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

Answer :

In a series R-C circuit, with the increase in frequency, current Increases

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77 views 1 answer
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

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

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170 views 1 answer
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?

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

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Description :

A DC voltage source is connected across a series RLC circuit. Under steady-state conditions, the applied DC voltage drops entirely across the

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

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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

Answer :

In a series RLC high Q circuit, the current peaks at a frequency equal to the resonant frequency

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311 views 1 answer
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

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

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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 resistor is the same C) The voltage drop across each resistor depends on the value of the resistor D) All the above

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

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Description :

In a series circuit with unequal resistances?

Answer :

In a series circuit with unequal resistances the highest resistance has the highest voltage drop.

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Description :

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

Answer :

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

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Description :

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

Answer :

0.1s

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Description :

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

Answer :

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

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Description :

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

Answer :

In a series L-C circuit at the resonant frequency the current is maximum.

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Description :

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

Answer :

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

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Description :

In series resonant circuit, increasing inductance to its twice value and reducing capacitance to its half value?  

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.

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Description :

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

Answer :

In a series resonant circuit, the impedance of the circuit is minimum.

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Description :

Define Multivibrator. State the types of multivibrator. Which M/V can be used as a flip-flop? Draw the circuit diagram.

Answer :

Definition:- A multivibrator is an electronic circuit that switches rapidly by means of positive feedback between two or more states.  OR  A multivibrator is an electronic circuit used to implement a ... Bistable Multivibrator: it can operate as a flip-flop, Circuit diagram 

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Description :

Define Sample and hold period with reference to S/H circuit.

Answer :

Sample Period:- The time period during which the voltage across the capacitor is equal to the input voltage is called sample period. Hold Period:- The time period during which the voltage across the capacitor is constant is called hold period.

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Description :

 An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

Answer :

 An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

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Description :

A snubber circuit is connected to the power semiconductor device to reduce the (A) turn-on time (B) turn-off time (C) electrical stresses (D) thermal resistance

Answer :

A snubber circuit is connected to the power semiconductor device to reduce the electrical stresses

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Description :

What is the role of a capacitor in a circuit?

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Description :

Answer :

Integrated circuit design for particular application is known as Application Specific Integrated Circuit ASIC. ASIC have smaller size, less power consumption and less cost .

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Description :

Explain the procedure to perform Short Circuit test on single phase transformer with circuit diagram.

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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

Answer :

The armature current on symmetrical 3 phase short circuit of a synchronous machine (salient pole) has d -axis current only

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Description :

Answer :

Short circuit test on transformers is conducted to determine copper losses.

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Description :

Draw the circuit diagram of battery charger using SCR and explain it’s working.

Answer :

Battery charger circuit using SCR: The figure shows the battery charger circuit using SCR. A 12V discharged battery is connected in the circuit and switch SW is closed. The singlephase 230V ... not fired. In this way, after full charging, further charging is automatically stopped.

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299 views 1 answer
Description :

Explain working of static AC circuit breaker. 

Answer :

Static AC Circuit breaker: The circuit configuration of static AC circuit breaker using SCR is shown in the figure. When switch S' is closed, the SCRs T1 and T2 are fired in positive ... non-availability of gate current. Thus the maximum time delay for breaking the circuit is one half-cycle.

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Description :

With neat diagram explain synchronized UJT triggering circuit.

Answer :

Line Synchronized UJT triggering circuit: The UJT is almost ideal as a firing device for SCRs. There are 2 main reasons for the compatibility between UJTs and SCRs. Firstly, the UJT produces a ... , the SCR is sure to have the right polarity between the anode and cathode for turning on.

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Description :

Draw circuit diagram of symmetrical configuration of bridge converter.

Answer :

circuit diagram of symmetrical configuration of bridge converter

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Description :

Draw circuit diagram of Class B commutation.

Answer :

Class B: Resonant Pulse Commutation:

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Description :

Equivalent circuit of transformer

Answer :

Equivalent Circuit Diagram of Transformer Referred to Primary: V1 -Primary Input voltage I1 - Input Current I0- Exciting current/ No load current Im- Magnetizing component ... equivalent of secondary terminal voltage ZL- Load impedance ZL ′- Primary equivalent of load impedance

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265 views 2 answers
Description :

Briefly explain how the power factor of an inductive circuit can be improved.

Answer :

As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit. 

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Description :

Draw equivalent circuit of alternator.

Answer :

Equivalent circuit of alternator

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Description :

Why does leakage occur in a magnetic circuit?

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Description :

Describe control of a single lamp from three places. Draw the relevant circuit diagram. 

Answer :

Single lamp control from three places-  It consists of two way switches & intermediate switch, the circuit diagram is as shown in figure. We require two 2-way switches and one intermediate switch and a lamp ... position of any one switch is changed, then the lamp will be turned off.

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Description :

Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.

Answer :

Thyristor operated dimmer: A popular thyristor operated dimmer circuit employ TRIAC-DIAC phase control for low AC power control. During each half-cycle, the capacitor charges through (R1+VR1). When the ... time constant {C (R1+VR1)}. Thus by reducing VR1 the lamp brightness can be increased.

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Description :

Design a temperature detecting circuit  assuming a linear temperature (T, in degree Celsius) detecting signal in Voltage (mV)  V = 0.2 + 0.1 * T  T is from 10 (oC) to 80 (oC)  Design an amplifying circuit based on MOSFETs.  Output voltage should be larger than 0.5V  The output voltage should be linear with ... you show detail about how to detect the temperature, how the circuit work, restriction,...  really need the PSPICE circuit and how to simulation.  Thank you so much!

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Description :

Important Terms in Magnetic Circuit

Answer :

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Description :

Magnetic Circuit and its Analysis

Answer :

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Description :

Answer :

It is denoted as τ, tau and has the value of 1/RC. We

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Description :

Basic Circuit Elements Symbols

Answer :

Basic Circuit Elements Symbols

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Description :

Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

Answer :

Sinusoidal Steady-State Analysis - Using nodal analysis, find node voltages in the circuit.

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Description :

A parallel RLC circuit has the node equation Determine v(t) using the phasor method.

Answer :

A parallel RLC circuit has the node equation Determine v(t) using the phasor method.

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