19 views
in Instrumentation and control by
In a thyristor Latching current is than holding current: - a) equal b) less c) greater d) none of the above

1 Answer

0 votes
by

In a thyristor Latching current is than holding current: - greater

Related questions

1 answer 51 views

The typical ratio of latching current to holding current in a 20A thyristor is : (A) 5.0 (B) 2.0 (C) 1.0 (D) 0.5

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 305 views

What is holding current and latching current in SCR? Draw the gate characteristics of an SCR and explain the characteristics. What are the different signals which can be used for turning on SCR by gate control? compare them.

asked Feb 3, 2018 in Unit 1 by Shimroz
1 answer 7 views

In a thyristor, holding current is   (a) More than latching current IL (b) Less than IL (c) Equal to IL (d) Very small

asked May 13, 2018 in Thyristor by Shimroz123
1 answer 8 views

In thyristor. holding current is (A) More than the latching current (B) Less than the latching current (C) Equal to latching current (D) None of the above

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

 The effective resistance of a coil at high frequency is more than its de resistance on account of : -  a) Skin effect b) Proximity effects c) Eddy current losses d) All the above

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 13 views

Holding current for an SCR is best described as:  (1) The minimum current required for turn-off (2) The current required before an SCR will turn on (3) The amount of current required to maintain conduction (4) The gate current required to maintain conduction

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 7 views

In a thyristor, the magnitude of anode current will:

asked May 22, 2018 in Power Electronics by Shimroz123
1 answer 16 views

Anode current in an thyristor is made up of   (A) electrons only (B) electrons or holes (C) electrons and holes (D) holes only

asked May 17, 2018 in Power Electronics by Shimroz123
1 answer 95 views

"In any network containing more than one sources of e.m.f. the current in any branch is the algebraic sum of a number of individual fictitious currents (the number being equal to the number of sources of e.m.f.), each of which is due to separate action of each source of e.m.f., taken in order ... sources of e.m.f. are replaced by conductors, the resistances of which are equal to the internal resistances of the respective sources". The above statement is associated with?

asked Mar 25, 2018 in Network Analysis by Shimroz123
1 answer 39 views

The dc current through each diode in a bridge rectifier equals : - a) the load current b) half the dc load current c) twice the dc load current d) one-fourth the dc load current

asked Apr 14, 2018 in Instrumentation and control by Shimroz123
1 answer 14 views

Leakage current flows through the thyristor in

asked May 8, 2018 in Power Electronics by Shimroz123
1 answer 24 views

What is the line current of a circuit when the current transformer of 1000 : 5 rating measures 4 amp? (A) 5000 amp (B) 1000 amp (C) 400 amp (D) 800 amp 

asked Apr 23, 2018 in Instrumentation and control by Shimroz123
1 answer 36 views

A ferrite core has less eddy current loss than an iron core because?

asked Mar 25, 2018 in Electrical Engineering by Shimroz123
1 answer 39 views

why ACcurrent is smaller than DC current

asked Jan 12, 2018 in Electrical Engineering by lagougg
0 answers 24 views

A thyristor power converter is said to be in discontinuous when:  (A) The load current is zero even though the load voltage is present. (B) Both load voltage and load current are zero simultaneously. (C) The load current is present even though load voltage is zero. (D) When load current is ripple free. 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 316 views

What is the use of a thyristor in a circuit?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 20 views

An open-loop system is better than a closed-loop system in terms of   (a) Accuracy (b) Stability (c) Noise reduction (d) Sensitivity  

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

Identify type of BJT configuration having following features : (i) BJT configuration having the least current gain. (ii) KIT configuration called as voltage follower. (iii) BJT configuration having current gain less than one. (iv) BJT configuration suitable for impedance matching. (v) BIT configuration suitable for voltage amplification. (vi) BJT configuration having the least output impedance.  

asked 5 days ago in Elements of Electronics by Shimroz123
1 answer 11 views

The leakage current must not be more than ____________ of maximum supply current

asked May 29, 2018 in Electrical Engineering by Shimroz123
1 answer 28 views

The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is (A) 1.2 kW (B) 1 kW (C) 600 W (D) 500 W

asked Apr 25, 2018 in Instrumentation and control by Shimroz123
1 answer 9 views

The input frequency is 50 Hz. The ripple frequency in a 12 phase full wave rectifier is (A) 1200 Hz (B) 600 Hz (C) 100 Hz (D) 50 Hz 

asked Apr 23, 2018 in Instrumentation and control by Shimroz123
0 answers 20 views

A toothed type Tacho-generator has 60 teeth. A magnetic pickup is used in conjunction with it. The number of pulses generated per second in the magnetic pick up is : -  a) 3000 b) 1500 c) 1800 d) 1200

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 63 views

An aquadog is used in a 'CRO' to collect -  a) Secondary emission electrons b) Primary emission electrons c) Both Primary and Secondary emission electrons d) None of the above

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 6 views

When a pure inductor is connected in series with a lamp circuit, effect is: -  a) Dimmer b) Brighter c) Same d) Fused

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 17 views

Transformer coupling is used in class A amplifier to make it : -  a) more efficient b) less bulky c) less costly d) distortion free

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 19 views

 In an electronic ohmmeter an op -amp is used as a: -  a) sommer b) multiplier c) buffer amplifier d) integrator

asked Apr 10, 2018 in Instrumentation and control by Shimroz123
1 answer 6 views

The number of p-n junctions in a thyristor are  A)1 B) 2 C) 3 D) 4

asked May 20, 2018 in Power Electronics by Shimroz123
0 answers 14 views

In the snubber circuit used in a thyristor to limit the peak voltage overshoot applied across it damping ratio is taken as about  A) 0.14 B) 0.21 C) 0.36 D) 0.62

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
2 answers 222 views

In a thyristor D.C. chopper, which type of commutation results in best performance ?

asked Dec 31, 2017 in Power Electronics by Quiz
0 answers 804 views

In river crossing, hilly terrain, modern HV lines have span more than (a) 50 m (c) 500 m (b) 100 m (d) 800 m

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

In a lamp load when more than one lamp are switched on the total resistance of the load?

asked Mar 25, 2018 in Basic concepts by Shimroz123
1 answer 13 views

In amplitude modulation AM, if modulation index is more than 100% then: (1) Power of the wave increases. (2) Efficiency of transmission increases. (3) The wave gets distorted. (4) Bandwidth increases

asked May 29, 2018 in Electronics communication by Shimroz123
1 answer 24 views

In similar sized NMOS and PMOS transistor, NMOS is ____ than PMOS (A) Faster (B) Slower (C) Same speed (D) None of the above

asked May 12, 2018 in VLSI Design by Shimroz123
0 answers 16 views

In terms of cost, overhead transmission line is better than underground transmission line in the field of   (a) Insulation (b) Right of way (c) Visibility (d) None of these 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
0 answers 43 views

A thyristor is triggered by a pulse train of 5 kHz. The duty ratio is 0.4. If the allowable average power is 100 W, the maximum allowable gate drive power will be 

asked May 25, 2018 in Power Electronics by Shimroz123
1 answer 17 views

A three-phase, 440 V, 50 Hz ac mains fed thyristor bridge is feeding a 440 V dc, 15 kW, 1500 rpm separately excited dc motor with a ripple free continuous current in the dc link under all operating conditions, Neglecting the losses, the power factor of the ac mains at half the rated speed is  (A) 0.354 (B) 0.372 (C) 0.90 (D) 0.955

asked May 18, 2018 in Power electronics converters by Shimroz123
1 answer 20 views

A three-phase, fully controlled thyristor bridge converter is used as line commutated inverter to feed 50 kW power 420 V dc to a three-phase, 415 V(line), 50 Hz ac mains. Consider dc link current to be constant. The rms current of the thyristor is  (A) 119.05 A (B) 79.37 A (C) 68.73 A (D) 39.68 A

asked May 18, 2018 in Power electronics converters by Shimroz123
1 answer 15 views

A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is  (A) 0.78 (B) 0.827 (C) 0.866 (D) 0.9

asked May 18, 2018 in Power electronics converters by Shimroz123
1 answer 17 views

The turn-off time of a thyristor is 30 is at 50°C. What is its turn-off time at 100°C ?

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 14 views

During forward blocking state, a thyristor is associated with . (A) Large current and low voltage (B) Low current and large voltage (C) Medium current and large voltage (D) None of the above

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
0 answers 21 views

A single phase fully controlled thyristor bridge ac -dc converter is operating at a firing angle of 25 degree and an overlap angle 10 degree with constant dc output current of 20A. The fundamental power factor (displacement factor) at input ac mains is : (A) 0.78 (B) 0.827 (C) 0.866 (0) 0.9

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
0 answers 95 views

What is a phase control thyristor?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 24 views

What is a reverse conducting thyristor?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 17 views

What is the function of a thyristor?

asked Mar 19, 2018 in Thyristor by Quiz
1 answer 52 views

Is a SCR a thyristor?

asked Mar 19, 2018 in Thyristor by Quiz
0 answers 32 views

How is a thyristor used to convert AC to DC?

asked Mar 19, 2018 in Thyristor by Quiz
2 answers 90 views
1 answer 104 views

What is the difference between a thyristor and an SCR?

asked Dec 9, 2017 in Power Electronics by Quiz
1 answer 8 views

In a single phase induction energy meter, in order to obtain true value of energy, the shunt magnetic flux should lag behind the applied voltage by   (a) 90o (b) 0o (c) 45o (d) 60o

asked May 13, 2018 in Instrumentation and control by Shimroz123

Welcome to electronics2electrical.com here you can ask questions related to electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc.
Be respectful to all the members. Do not copy and paste the answers from other websites which have copyright content. While asking question give full details about it.

Categories

Most popular tags

power motor dc circuit transformer voltage current used system phase resistance factor synchronous load ac energy induction electric generator series frequency between speed capacitor use electrical meter line difference control type mosfet transmission magnetic plant high single instrument bjt unit source advantages function diode and machine winding field define torque parallel amplifier supply shunt thyristor motors electricity arduino maximum time relay armature problem value on transformers types coil diagram state flow ratio material three formula starting direction theorem method emf operating efficiency digital wave microprocessor test instruments loss measure operation connected signal low applications effect single-phase network inductance temperature working constant losses different law wattmeter measuring compare controlled breaker drive device logic rc full switch flux wire resistivity disadvantages free of materials machines angle force converter conductor transistor gain open protection scr core measurement number bridge principle generators reactance circuits negative the friction iron loop short pole battery conservation steam resistors hysteresis computer using analog lines secondary station gate a rectifier inverter linear induced relays nuclear capacitance basic characteristics design direct work rotor electronics ammeter forces diesel damping rlc connection factors capacitors minimum insulation moving regulation running self systems air fault range main stability quality starter igbt eddy alternator ideal rl average 3-phase plants arc thermal error fuzzy biasing dielectric pressure balanced superposition errors copper rotation feedback impedance measured electronic electrons charge inductive transfer explain start off back curve over solar is three-phase tariff locomotive peak bias zener engineering commutator surge conductors rating universal potentiometer density permanent mechanical transducer capacity memory adc excitation two fuse pure harmonics application semiconductor inductor internal pmmc reaction welding resonance traction permeability breakers rms designed electromagnetic si generation brushes switching capacitive shaded rate 1 distribution resistor methods delta star oscillator reluctance simplification algebra 8085 boolean weston dynamometer insulating strength installation definition fuel heating earth units
...