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What does it mean to analyze a circuit?

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Description : Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life. 

Answer : 1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series.  2) ...   4) Effect on Life:- If supply voltage is not stable then life of LED get reduced. 

Answer : When the total impendance equals  supply frequency.

Description : What is a clipping circuit?

Description : What is a diode clamper circuit?

Answer : Tha faction of diode 

Description : What is the use of diode in the circuit?

Answer : Diode is a device which allows the flow of current in one direction and blocks the current in opposite direction.

Description : What is the frequency response of a circuit?

Description : What is DC analysis of a circuit?

Description : What is the analog circuit?

Description : Why does leakage occur in a magnetic circuit?

Description : Power factor of an inductive circuit is usually improved by connecting capacitor to it in?

Answer : Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.

Answer : It is required to measure the true open circuit e.m.f. of a battery. The best device is D.C. potentiometer.

Description : What supplies energy to move through a circuit?

Answer : A  potentiall  diffrence  provides  sunction  pressure.

Description : What is unilateral and bilateral circuit?

Answer : Unilateral Circuit: If the characteristic (response or behavior) of circuit depends on the direction of flow of current through its elements, then the network is called as a unilateral network.  ... the direction of current through its elements, then the network is called as a bilateral network.

Description : What is electrical circuit ?

Answer : An electric circuit is the interconnection of electrical elements. Electrical elements like battery, lamp, wire etc.

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

Description : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Answer : Consider a circuit with three parallel branches connected across a DC supply. What is the ratio of the branch currents I1 : I2 : I3 if the branch resistances are in the ratio of 2 : 3 : 4 respectively? A) 2 : 3 : 4 B) 6 : 4 : 3 C) 4 : 3 : 2 D) None of these

Description : What is the use of a thyristor in a circuit?

Description : What is the power factor of purely resistive circuit.

Answer : Unity that is 1

Description : What is the role of a capacitor in a circuit?

Description : What is the direction of flow of electric current in an electric circuit?

Answer : It  flows  from  anode  to  cathode  (direction  of   holes  flow)

Description : What is a node in an electrical circuit?

Answer : a positively charged electrons

Description : What is mesh in circuit theory?

Answer : A mesh is barrier made of conneticonstrands of metal fiber or other flexible or ductile materials

Description : What is digital circuit design?

Description : What is electronic circuit design?

Description : What can cause a short circuit?

Description : What is the maximum number of circuit breakers in a panel?

Answer : It depends on that which type of panel is this.

Answer : Sample and hold circuit is the important part of data converters (ADC and DAC). Sample and hold circuit is also called as track-and-hold circuit. Sample and hold circuit is use for sampling ... some time. Sample and hold circuit basically uses an analogue switch (like JFET) and capacitor.

Description : What is the purpose of a capacitor in an AC circuit?

Answer : Every AC supply is not ideal AC it contains DC component so to provide restriction to DC component in supply we have to use Capacitor

Description : what is SF6 circuit breaker?

Answer : A circuit breaker in which SF6 under pressure gas is used toextinguish the arc is calledSF6 circuit breaker. SF6 (sulphur hexafluoride) gas has excellent dielectric , arc quenching, chemical and other physical properties and has proved its ...

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 .

Description : What is drive circuit in power electronics?

Answer : Driver is used for Motion Control through the use of power electronics.

Answer : In short circuit test of transformer the low voltage side is short circuited . On high voltage side the voltmeter is connected in parallel and ammeter in series and also a wattmeter is ... circuit test is done for determining impedance and losses. In this test iron losses is neglected.

Description : Refer to the circuit below. The total absorbed (consumed) power is:

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.

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

Description : Explain why potential difference is necessary to produce current in a circuit.

Description : Mention the precautions to be taken while connecting CT and PT in the circuit. 

Answer : Precautions to be taken while using instrument transformers: 1. Secondary of CT is never kept open circuited when it is energized. 2. Secondary of PT is never kept short circuited when it ... of the instrument transformers unless they are properly grounded. 8. Never connect to DC circuits.

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 

Description : A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

Answer : A circuit breaker is designed to protect an electrical circuit from damage caused by :  (A) Over load (B) Short circuit (C) Over current (D) All of the above

Description : A dummy strain gage is used in a quarter bridge strain gage circuit to :  (A) compensate for changes in temperature and lead wire resistance  (B) produce more output voltage from the bridge  (C) increase the sensitivity of the bridge  (D) compensate lead wire resistance only

Answer : A dummy strain gage is used in a quarter bridge strain gage circuit to : compensate for changes in temperature and lead wire resistance 

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

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

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

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 : 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

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

Description : In a pure capacitive circuit if the supply frequency is reduced to 1/2, the current will?

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?

Answer : In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will be doubled.

Description : The purpose of a parallel circuit resonance is to magnify?

Answer : The purpose of a parallel circuit resonance is to magnify voltage.

Description : Time constant of a circuit is the time in seconds taken after the application of voltage to each?

Answer : Time constant of a circuit is the time in seconds taken after the application of voltage to each 63% of maximum value.

Description : All the rules and laws of D.C. circuit also apply to A.C. circuit containing?

Answer : All the rules and laws of D.C. circuit also apply to A.C. circuit containing resistance only.

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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