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What can cause a short circuit?

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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 : What can cause a voltage spike?

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

Description : Describe the difference between an open circuit and a short circuit.

Answer : Open circuit means the wire is cut meaning power will not flow and close circuit means wire is not cut and hence power will flow.Short circuit is the same as close circuit

Description : If the % reactance upto the fault point is 20%, then the short circuit current will be

Answer : If the % reactance upto the fault point is 20%, then the short circuit current will be 5 times the full load current

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

Description : Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.

Answer : Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.

Answer : The short circuit in any winding of the transformer is the result of impulse voltage.

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

Description : In which fault the maximum short circuit current occurs?

Answer : In three phase bolted fault the maximum short circuit occurs.

Description : What is the cause of voltage fluctuation?

Description : What is the cause of a brownout?

Description : What would cause a power surge in a house?

Answer : If your neibour / other flat owners / your maintainer staff switch on any type of inductive load that can cause power surge / dip  

Description : Why do non linear loads cause harmonics?

Description : What can cause high amperage on a motor?

Answer : High  amperage  can  result  in  a motor  when the  amount  of  load  increases. when  load  increases  , it  reduces  the  rotor  speed which  increases  the  slip  at  constant  synchronous  speed ... ,  as  a  result  more  current  shall  have  been  drawn  to  maintain  the  additional  load.

Description : what is mean by short transmission line ?

Answer : The transmission lines which have length less than 80 km is known as short transmission lines.

Description : State the effects of low power factor on efficiency and voltage regulation of short transmission lines. 

Answer : i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor) 

Description : State advantages of short pitch winding over full pitch winding in alternators. 

Answer : Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved. 

Description : 3X3 inverse of matrix short trick

Answer : 3X3 inverse of matrix short trick

Description : For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is

Answer : For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is 0.707 lead

Answer : Armature coil is short circuited by brushes when it lies along neutral axis.

Answer : Reactance relay is preferred for phase fault on short transmission line.

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. 

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 

Description : The number of cycles in which a high speed circuit breaker can complete its operation is  (A) 3 to 8 (B) 10 to 18 (C) 20 to 30 (D) 40 to 50

Answer : The number of cycles in which a high speed circuit breaker can complete its operation is 3 to 8

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.

Description : Can you apply Thevenin's theorem in an AC circuit?

Answer : It  can  be  applied  to  AC  circuits

Description : Can we apply the superposition theorem to AC circuit?

Description : Can we apply Norton's theorem in an AC circuit?

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 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 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 supplies energy to move through a circuit?

Answer : A  potentiall  diffrence  provides  sunction  pressure.

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 is the frequency response of a circuit?

Description : What does it mean to analyze a circuit?

Description : What is DC analysis of a circuit?

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