At the time of short-circuit, what will be the current in the circuit?

1 Answer

Answer :

– Increases heavily

Related questions

Description : At the time of short circuit, the current in the circuit reduces substantially. does not change. increases heavily. vary continuously. -Physics-10

Last Answer : increases heavily When two naked wires in the circuit come in contact with each other, the amount of current flowing in the circuit increase abruptly resulting in short circuit.

Description : At the time of short-circuit, what will be the current in the circuit? -Do You Know?

Last Answer : answer:

Description : At the time of short-circuit, what will be the current in the circuit?

Last Answer : Increases heavily

Description : Define the followings.   Insulation level, Rated short circuit breaking current, Making current, Short time rating, Impulse withstand voltage, Power frequency withstand voltage .

Last Answer : Insulation level - it is the combination of rated voltage, the corresponding impulse withstand voltage, which together characterize the insulation of the equipment as regards its ability to withstand ... wave of power frequency (50 Hz) which the insulation of equipment should withstand. 

Description : 1. Which is used extensively for genetic engineering in plant? 2. The Centre-State financial distribution takes place on the recommendation by which ministry? 3. At the time of short-circuit, what ... first in producing teak? 20. By whom was the agitation against the partition of Bengal led?

Last Answer : Answer : 1 1. Agrobacterium tumefaciens 2. Finance Minister 3. Increases heavily 4. India 5. Warangal 6. Bentham 7. September 8 8. RNA 9. Eyre 10. M. G. Ranade 11. Attorney General 12. ... Mission 16. October 8 17. Salinity 18. Government of India Act, 1935 19. Thailand 20. Surendranath Banerjee

Description : Define the following terms related to circuit breaker. 1) Breaking Capacity 2) Making Capacity 3) Short time rating and 4) Normal current rating

Last Answer : 1) Breaking Capacity: It is current (r.m.s) that a circuit breaker is capable of breaking at given recovery voltage under specified conditions (e.g. power factor, rate of rise of ... under specified conditions. The only limitation in this case is the temperature rise of current-carrying parts.

Description : What is short circuit current ?

Last Answer : Answer : A fault in an electrical system whose current, before or after the current flows through the load, is combined with one or more phases of neutral current which causes more current to flow than normal. The current is called short circuit current.

Description : What is the method of diagnosing short circuit current ?

Last Answer : There are three methods for determining short circuit current , namely- 1) Ohmic method 2) Per unit method 3.) Percentage reactance method.

Description : Which of the device is employed in substation to limit the short circuit current in the power system: a) Shunt condenser b) Reactor c) Series capacitor d) Shunt capacitor

Last Answer : Ans: B

Description : The function of fuse in an electrical circuit is (a) avoid electric shocks (b) regulate the flow of current (c) break the circuit in case of overloading or short circuiting (d) switch off current

Last Answer : Ans:(c)

Description : When insulation failure produces a low resistance current path between two conductors, the resulting condition is known as ____________. A. an open B. a short circuit C. a ground D. a surge

Last Answer : Answer: B

Description : An accidental path of low resistance which passes an abnormal amount of current is known as a/an _____________. A. polarized ground B. short circuit C. ground reference point D. open circuit

Last Answer : Answer: B

Description : Which device will stop the motor shown in the illustration in case of a short-circuit (high current) motor overload? EL-0080 A. 'F' B. 'G' C. 'H' D. 'I'

Last Answer : Answer: A

Description : To properly use a hook-on-type volt/ammeter to check current flow, you must FIRST _____________. A. de-energize the circuit to allow connection of the instrument in series B. hook the jaws ... test leads to the appropriate terminals D. short the test leads and calibrate the instrument to zero

Last Answer : Answer: B

Description : An accidental path of low resistance, allowing passage of abnormal amount of current is known as a/an ____________. A. open circuit B. short circuit C. polarized ground D. ground reference point

Last Answer : Answer: B

Description : Name any two methods of reducing short circuit current/ By providing neutral reactance.

Last Answer : By introducing a large value of shunt reactance between buses.

Description : At dead short circuit at terminals of Alternator then the current I is a) ZPF Lag b) ZPF lead c) Unity power factor d) 0.8 Power factor lag

Last Answer : Ans: ZPF Lag

Description : Circuit breakers usually operate under (a) transient state of short-circuit current (b) sub-transient state of short-circuit current (c) steady state of short-circuit current (d) after D.C. component has ceased

Last Answer : (a) transient state of short-circuit current

Description : Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission

Last Answer : (a) Increase of short-circuit current of the system

Description : What is the effect on total resistance and total current in a circuit if a short occurs in (a) a parallel branch, and (b) in a series portion?

Last Answer : (a) Total resistance decreases, total current increases (b) Total resistance decreases, total current increases

Description : Constant voltage transmission entails the following disadvantage (a) large conductor area is required for same power transmission (b) short-circuit current of the system is increased (c) either of the above (d) none of the above

Last Answer : (b) short-circuit current of the system is increased

Description : Which of the following is the demerit of a 'constant voltage transmission system' ? (a) Increase of short-circuit current of the system (b) Availability of steady voltage at all loads at ... of carrying increased power for a given conductor size in case of long-distance heavy power transmission

Last Answer : (a) Increase of short-circuit current of the system

Description : During short circuit test iron losses are negligible because A. The current on secondary side is negligible B. The voltage on secondary side does not vary C. The voltage applied on primary side is low D. Full-load current is not supplied to the transformer

Last Answer : C) the voltage applied on primary side is low

Description : The synchronous reactance of the synchronous machine is ______________. (A) Ratio between open circuit voltage and short circuit current at constant field current (B) Ratio between short circuit ... (D) Ratio between short circuit voltage and open circuit current at different field current

Last Answer : Ans. A The Synchronous reactance of a synchronous machine is a total steady state reactance, presented to applied voltage, when rotor is running synchronously without excitation. Therefore , XS = Ef / IS = Emf of OC for same If / short circuit current

Description : During short circuit test iron losses are negligible because A. The current on secondary side is negligible B. The voltage on secondary side does not vary C. The voltage applied on primary side is low D. Full-load current is not supplied to the transformer

Last Answer : C) the voltage applied on primary side is low

Description : A field excitation of 20 A in a certain alternator results in an armature current of 400 A in short circuit and a terminal voltage of 2000 V on open circuit. The magnitude of the internal voltage drop within the machine at a load current of 200 A is  (A) 1 V (B) 10 V (C) 100 V (D) 1000 V

Last Answer : 800

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 : 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 : In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized

Last Answer : In the induction type directional over current relay, when a short-circuit occurs in the circuit power flows in reverse direction

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

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

Description : The fuse in our domestic electric circuit melts when there is a high rise in – (1) Inductance (2) Current (3) Resistance (4) Capacitance

Last Answer : (2) Current Explanation: In electronics and electrical engineering, a fuse is a type of low resistance resistor that acts as a sacrificial device to provide over protection, of either the load ... fuse interrupts excessive current (blows) so that further damage by overheating or fire is prevented.

Description : The rate of transfer of charges through a circuit is called? (1) Potential Difference (2) Resistance (3) Current (4) Energy

Last Answer : (3) Current Explanation: The rate of transfer of charges through a circuit is called Current. An electric current is the rate of flow of electric charge past a point or region. An electric current is said to exist when there is a net flow of electric charge through a region.

Description : A device which is used to limit the current in an electrical circuit is called a - (1) Grid (2) Fuse (3) Hub (4) Conductor

Last Answer : (2) Fuse Explanation: A fuse places a limit on the amount of current that can be drawn by an electric circuit by opening (blowing or melting) when the current exceeds a preset limit. This protects the circuit and the surroundings from fire or damage in the case of an overload or short circuit.

Description :  Kirchhoff's 2nd law deals with A. current in circuit B. voltage in circuit C. e.m.f in circuit D. both B and C

Last Answer : both B and C

Description : Current entering and leaving a point in a circuit should be A. equal B. decreasing C. increasing D. variable

Last Answer : equal

Description : Current in a circuit depends on A. resistance B. potential difference C. both A and B D. e.m.f

Last Answer : potential difference

Description : Current in a circuit if resistance of 15 Ω and potential difference of 3.0 V is applied across it's ends is A. 1 A B. 2 A C. 0.5 A D. 0.20 A

Last Answer : 0.20 A

Description : Current in a circuit when a charge of 180 C passes a point in a circuit in 2 minutes is A. 1:00 AM B. 2:00 AM C. 3:00 AM D. 1.5 A

Last Answer : 1.5 A

Description : A series circuit consists of a two ohm RESISTOR and a one ohm INDUCTOR. The relationship between current and voltage is: w) current will lag by 30 degrees. x) current will lag by 26 degrees. y) current will lead by 26 degrees. z) current will lead by 30 degrees.

Last Answer : ANSWER: X -- CURRENT WILL LAG BY 26 DEGREES.

Description : Which is NOT a characteristic of a series circuit? w) The current is the same throughout. x) The total resistance is the sum of the individual resistance. y) The voltage of the source ... individual voltage drops. z) The total resistance is the sum of the reciprocals of the individual resistances.

Last Answer : ANSWER: Z -- THE TOTAL RESISTANCE IS THE SUM OF THE RECIPROCALS OF THE RECIPROCAL OF THE INDIVIDUAL RESISTANCES.

Description : An LED is operated on a 12 volt automobile circuit. The voltage drop across the LED is 2 volts and the current must be limited to 50 milliamps to prevent its overheating and destruction. What size resistor must be used? w) 60 ohms x) 100 ohms y) 120 ohms z) 200 ohms

Last Answer : ANSWER: Z -- 200 OHMS

Description : In a simple dc circuit, voltage equals resistance multiplied by current. This is also considered true in an AC circuit if the what values of the current and voltage are used.

Last Answer : ANSWER: ROOT MEAN SQUARE (RMS) VALUES

Description : The common-emitter transistor circuit can amplify a small current signal because a small change in the signal current produces one of the following. Does the change in signal produce a large change in the: w) emitter-base voltage x) base current y) collector current z) collector voltage

Last Answer : ANSWER: Y -- COLLECTOR CURRENT

Description : Which one of the following is the name of a device used to measure voltage without drawing ANY current from the circuit being measured? Is it: w) a wattmeter x) a galvanometer y) an ammeter z) a potentiometer

Last Answer : ANSWER: Z -- A POTENTIOMETER

Description : The potential drop between the terminals of a battery is equal to the battery's EMF when: w) no current is drawn from the battery x) a very large current is drawn from the battery y) the internal resistance of the battery is very large z) the resistance in the external circuit is small 

Last Answer : ANSWER: W -- NO CURRENT IS DRAWN FROM THE BATTERY

Description : A circuit which employs a DIRECT CURRENT source has a branch which contains a capacitor. After the circuit has reached a steady state, what is the magnitude of the current in the circuit branch which contains the capacitor?

Last Answer : ANSWER: THE CURRENT IS ZERO

Description : A device which is used to limit the current in an electrical circuit is called a (1) Grid (2) Fuse (3) Hub (4) Conductor 

Last Answer : Fuse