A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will?
Last Answer : A capacitor-start single phase induction motor is switched on to supply with its capacitor replaced by an inductor of equivalent reactance value. It will not start at all.
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236 views
1 answer
asked
Mar 20, 2018
by
anonymous

what is TCSC?
Last Answer : Thyristor Controlled Series Capacitor (TCSC)
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224 views
1 answer
asked
Aug 8, 2017
by
anonymous

What is the purpose of a capacitor in an AC circuit?
Last 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
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185 views
1 answer
asked
Dec 16, 2017
by
anonymous

How does a capacitor improve power factor?
Last Answer : Every circuit are usually more inductive than capacitive.it means that the current lags by voltage at small angle.hence we have to compensate this situation so we use Capacitor then this lag is compensate ... angle becomes low and the value of cos(phase angle) is increase and hence power also max.
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164 views
1 answer
asked
Dec 16, 2017
by
anonymous

Sparking occurs when a load is switched off because the circuit has high?
Last Answer : Sparking occurs when a load is switched off because the circuit has high inductance.
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124 views
1 answer
asked
Mar 25, 2018
by
anonymous

In a lamp load when more than one lamp are switched on the total resistance of the load?
Last Answer : In a lamp load when more than one lamp are switched on the total resistance of the load decreases.
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316 views
1 answer
asked
Mar 25, 2018
by
anonymous

Last Answer : Generating capacity connected to the bus bars and ready to take load when switched on is known as spinning reserve.
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179 views
1 answer
asked
Mar 20, 2018
by
anonymous

If a transformer is switched on to a voltage more than the rated voltage?
Last Answer : If a transformer is switched on to a voltage more than the rated voltage its power factor will deteriorate.
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98 views
1 answer
asked
Mar 19, 2018
by
anonymous

Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
Last 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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368 views
1 answer
asked
May 3, 2020
by
anonymous

Thyristor can be protected from over voltages by using
Last Answer : Thyristor can be protected from over voltages by using Voltage clamping device
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108 views
1 answer
asked
May 8, 2018
by
anonymous

Leakage current flows through the thyristor in
Last Answer : Leakage current flows through the thyristor in Forward blocking mode and Reverse blocking mode.
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211 views
1 answer
asked
May 8, 2018
by
anonymous
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What is a phase control thyristor?
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153 views
0 answers
asked
Mar 19, 2018
by
anonymous

Why thyristor are not preferred for inverter?
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455 views
0 answers
asked
Mar 19, 2018
by
anonymous

What is thyristor family?
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67 views
0 answers
asked
Mar 19, 2018
by
anonymous

What is meant by firing angle of thyristor?
Last Answer : The point at which SCR is triggered is known as firings angle of thyristor.
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235 views
1 answer
asked
Mar 19, 2018
by
anonymous

What is the use of a thyristor in a circuit?
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2.9k views
0 answers
asked
Mar 19, 2018
by
anonymous

What is a reverse conducting thyristor?
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87 views
0 answers
asked
Mar 19, 2018
by
anonymous

What is the function of a thyristor?
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93 views
0 answers
asked
Mar 19, 2018
by
anonymous

Why SCR is called as thyristor?
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97 views
0 answers
asked
Mar 19, 2018
by
anonymous

Is a SCR a thyristor?
Last Answer : Yes, SCR is a thyristor. Thyristor is the family and SCR is the member of that family but SCR is universally known as thyristor.
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162 views
1 answer
asked
Mar 19, 2018
by
anonymous

How is a thyristor used to convert AC to DC?
Last Answer : thyristor
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123 views
1 answer
asked
Mar 19, 2018
by
anonymous

What is the application of thyristor?
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90 views
0 answers
asked
Mar 19, 2018
by
anonymous

Last Answer : Yes ,it is one of the main advantage using thristors as a switch in DC circuit ,it has a high current gain
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161 views
2 answers
asked
Mar 6, 2018
by
anonymous
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Explain thyristor gate drive circuit.
Last Answer : Thyristor Gate Drive Circuit: The thyristor can be turned on by pulse voltage signal at gate terminal and it does not require continuous drive signal like the transistor. The gate ... circuit provide required minimum gate voltage and gate current then the thyristor conducts properly.
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3.0k views
1 answer
asked
Feb 19, 2018
by
anonymous

parallel operation of MOSFET can be done more easily as compared to thyristor. why?
Last Answer : Parallel operation of MOSFET can be done more easily as compared to thyristor because the resistance of MOSFET is increases with increase in temperature. MOSFET have the positive temperature coefficient. In ... the parallel operation of MOSFET can be done more easily as compared to the thyristor.
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300 views
1 answer
asked
Dec 7, 2017
by
anonymous

what are the disadvantages of thyristor?
Last Answer : Disadvantages of thyristor The silicon controlled rectifier (SCR) is unidirectional devices, so it can control power only in DC power during positive half cycle of AC supply. Thus only DC power is ... cycle. It cannot be used at higher frequencies. The gate current cannot be negative
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888 views
2 answers
asked
Dec 6, 2017
by
anonymous
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write short notes on thyristor CSI .
Last Answer : Current-source inverter (CSI) is an inverter with a DC current input. Current source inverters are most commonly used in very high power AC motor drives.
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107 views
2 answers
asked
Nov 15, 2017
by
anonymous

Last Answer : By using some circuit the forward DC current of thyristor is forced to zero is called forced commutation.
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119 views
1 answer
asked
Sep 21, 2017
by
anonymous

Last Answer : Natural commutation is also called as line Communication. The turning off of thyristor due to AC supply is called natural commutation or line commutation. If the thyristor is connected to AC supply ... connected to positive and anode terminal get connected to negative, this turns off the thyristor.
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110 views
1 answer
asked
Sep 21, 2017
by
anonymous

Last Answer : No we cannot turn off normal thyristor using Gate.
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93 views
1 answer
asked
Sep 21, 2017
by
anonymous

Last Answer : Thyristor conducts when the anode voltage is greater than cathode and when the current provided to Gate.
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97 views
1 answer
asked
Sep 21, 2017
by
anonymous

Last Answer : Thyristor have three terminals anode, cathode and Gate.
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58 views
1 answer
asked
Sep 21, 2017
by
anonymous

thyristor can be turned off by?
Last Answer : Thyristor can be turned off by making anode potential equal to cathode potential or by making anode potential less than cathode potential.
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135 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : Thyristor commutation means turning off thyristor.
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145 views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : Thyristor can only be turned on by small gate pulse but it cannot be turn off by using gate hence thyristor is called semi controlled device.
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1.1k views
1 answer
asked
Sep 10, 2017
by
anonymous

Last Answer : Thyristor can be turn on by positive gate pulse and the current will continue to flow through the device even when the gate voltage is low hence thyristor is called latching device.
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918 views
1 answer
asked
Sep 10, 2017
by
anonymous

Draw the structural diagram of GTO. Explain briefly the switching behavior of GTO with the help of appropriate voltage and current waveform.
Last Answer : Gate Turn Off Thyristor (GTO) Conventional Thyristor can be turned on with gate terminal but can not turn off from gate terminal. But in case of Gate Turn Off Thyristor (GTO), we can turn it on and off ... subdivided as storage period (Ts), fall period (Tp) and tail period (Tt).
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1.7k views
1 answer
asked
Aug 8, 2017
by
anonymous

Obtain the Ripple factor of a full wave rectifier with shunt capacitor filter.
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10 views
0 answers

Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.
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46 views
0 answers

Describe the operation of shunt capacitor filter with the help of circuit diagram and waveforms.
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6 views
0 answers

State the applications and specification of (i) Resistor (ii) Capacitor (iii)Inductor
Last Answer : Application of resistor: 1.Resistors are used in high frequency instrument. 2.Resistor is used in power control circuit. 3.It is used in DC power supplies. 4.Resistors are used ... DC Current 3.Electromagnetic Interference (EMI) 4.Magnetic Saturation Flux Density 5.Curie Temperature
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274 views
1 answer
asked
May 2, 2020
by
anonymous

Charging Action of capacitor
Last Answer : Charging Action of capacitor .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
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99 views
2 answers
asked
Apr 20, 2020
by
anonymous

Capacitor : Before charging takes place
Last Answer : Capacitor : Before charging takes place
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80 views
1 answer
asked
Apr 20, 2020
by
anonymous

Why is a capacitor used in a single phase motor and not in three phase motor ?
Last Answer : In 1-phase induction motor capacitor work is generate the auxiliary winding current than excite the main winding to rotor starts rotate. After rotor start rotating about 75% of their speed than auxiliary ... emf to start the motor.so,in 3-phase induction motor is self start induction motor.
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267 views
6 answers
asked
Sep 2, 2019
by
anonymous
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Does current flow through a capacitor ?
Last Answer : Imagine a pipe with a flexible diaphram in the middle separating two haves of the pipe. Now the pipe is filled with air. If you apply a pressure to one end the diaphram will deform ... capacitor, the effects on electrons will be recreated across the boundary. But theres no electrical connection...
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104 views
1 answer
asked
Aug 25, 2019
by
anonymous

Why is a capacitor used in a ceiling fan ?
Last Answer : For splitting phase so that a rotating magnetic field will be produced & as per Lenz's law a torque will be created & rotor starts rotating. In single phase if capacitor is not used for split phase then a pulsating mag. field is produced which is unable to produce torque on rotor
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228 views
3 answers
asked
Aug 18, 2019
by
anonymous

A 3 micro Faraday capacitor is connected closing a switch to a supply of 100 V through 1 milli ohm series resistance. Calculate 1 the time constant 2 initial charging current 3 the initial rate of ... second,after the switch has been closed 5 the time taken for the capacitor to be fully charged.
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99 views
0 answers
asked
Aug 13, 2019
by
anonymous

Explain the working of a single phase capacitor start induction motor.
Last Answer : Single phase capacitor start induction motor https://youtu.be/31lvvzU5Puc
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418 views
2 answers
asked
Jul 30, 2019
by
anonymous

Energy stored in capacitor examples
Last Answer : Energy stored in capacitor examples
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121 views
1 answer
asked
May 22, 2019
by
anonymous

Series and parallel capacitor problem
Last Answer : Series and parallel capacitor problem 1 : https://youtu.be/MSl5mRwtjAE Series and parallel capacitor problem 2 : https://youtu.be/yGwbpyEtIyw Series and parallel capacitor problem 3 : https:// ... https://youtu.be/_7KwEwWqiNU Series and parallel capacitor problem 10 : https://youtu.be/et8MCWV_OyE
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109 views
1 answer
asked
May 21, 2019
by
anonymous
