64 views
by
With the help of neat diagram, explain the method to obtain unidirectional polarity in train lighting.

1 Answer

0 votes
by

Method to obtain unidirectional polarity in train lighting: Dynamo has rocker arm mounted on the shaft, friction tight. When the direction of rotation of the shaft is clockwise, terminal X (positive) touches P1 while terminal Y(negative) touches N. Thus, giving the output polarity as shown in figure. When the direction of rotation is anticlockwise, X (negative) terminal of the rocker arm will now touch to N1 brush and Y(positive) terminal of the rocker arm will touch to P . Thus, the output polarities will be obtained as shown in figure. Thus, unidirectional polarity is obtained.

image

Related questions

1 answer 14 views

With the help of a neat circuit diagram explain the working principle of Digital to Analog converters.(DAC)

asked Sep 13, 2018 by Shimroz123
1 answer 20 views

With the help of neat diagrams,explain the following methods of speed control in DC series motor. i) Field diverter method. ii) Armature diverter method.

asked Sep 18, 2018 by Shimroz123
1 answer 16 views

With the help of neat diagram, explain the construction of current transformer. 

asked Sep 18, 2018 by Shimroz123
0 answers 49 views

Explain the leakage flux and its effect with the help of neat diagram.

asked Aug 8, 2018 by Quiz
1 answer 30 views

With neat diagram explain calibration of energy meter by direct loading method.

asked Sep 6, 2018 by Shimroz123
1 answer 2 views

Explain spring control method with neat diagram.

asked Sep 5, 2018 by Shimroz123
1 answer 20 views

Describe with neat circuit diagram the method of measurement of power in a High voltage, high current a.c circuit.

asked Sep 15, 2018 by Shimroz123
1 answer 190 views

With neat diagram explain use of “reactive power controller” to reduce technical losses in transmission and distribution system.

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 30 views

In a d.c. motor, unidirectional torque is produced with the help of

asked Mar 26, 2018 in DC motor by Shimroz123
1 answer 10 views

Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms. 

asked Jul 10 in Elements of Electronics by Shimroz123
1 answer 36 views

Explain working of 'hot wire anemometer with the help of diagram. 

asked Sep 13, 2018 by Shimroz123
1 answer 68 views

With the help of suitable diagram, explain how humidity is measured with dry and wet bulb thermometer.

asked Sep 9, 2018 by Shimroz123
1 answer 17 views

Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

asked Sep 5, 2018 by Shimroz123
1 answer 8 views

What is solenoid valve ? Explain its working with the help of diagram.

asked Sep 2, 2018 by Shimroz123
0 answers 29 views

With the help of a schematic diagram explain how a overcurrent relay protects a line during short circuit fault. 

asked Apr 3, 2018 in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by Shimroz123
0 answers 18 views

Explain space vector transformation and space vector switching with the help of diagram. What are the advantages of SVM?

asked Mar 10, 2018 in Power Electronics by Quiz
1 answer 111 views

Explain the construction of three phase induction motor with neat diagram.

asked Oct 25, 2018 in AC machine by Shimroz123
1 answer 7 views

With neat diagram, explain the working of clip-on ammeter.

asked Sep 6, 2018 by Shimroz123
1 answer 9 views

Explain the construction and working of a photoelectric cell with a neat diagram. 

asked Sep 4, 2018 by Shimroz123
1 answer 2 views

Explain the operation of pneumatic cylinder with neat diagram.

asked Sep 2, 2018 by Shimroz123
2 answers 60 views

Explain the hysteresis loop of a magnetic material with neat diagram.

asked Aug 8, 2018 by Quiz
1 answer 31 views

Explain energy conservation method in lighting system by using installation of separate transformer / servo stabilizer.

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 47 views

Explain concept of capacitive type proximity switch with neat schematic diagram.

asked 8 hours ago in Elements of Industrial Automation by Shimroz123
1 answer 340 views

Explain with neat diagram construction and working of Ajax Wyatt vertical core induction furnace.

asked Oct 13, 2018 in Industry Electrical Systems-II by Shimroz123
1 answer 2 views

With neat diagram explain working of Ratiometric conversion. 

asked Sep 12, 2018 by Shimroz123
1 answer 6 views

With neat diagram, explain working of capacitance level measurement.

asked Sep 9, 2018 by Shimroz123
1 answer 6 views

With neat diagram explain constructional details of dynamometer type wattmeter.

asked Sep 6, 2018 by Shimroz123
2 answers 161 views

Explain construction & working of attraction type M.I. instrument with neat diagram.

asked Sep 5, 2018 by Shimroz123
2 answers 17 views

With neat diagram explain working of NPN transistor.

asked Sep 5, 2018 by Shimroz123
1 answer 40 views

With neat diagram explain the following terms: (i) Steam turbine co-generation system (ii) Gas turbine co-generation system

asked Sep 22, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 3 views

Explain the electrolytic capacitor with neat diagram.

asked Sep 4, 2018 by Shimroz123
0 answers 26 views

Explain the term self induced EMF with a neat diagram.

asked Aug 8, 2018 by Quiz
1 answer 15 views

With example explain how the replacement of lamps in lighting system contributes for energy conservation?

asked Oct 3, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 1 view

Explain pressure actuated switch with neat constructional diagram.

asked 13 minutes ago in Elements of Industrial Automation by Shimroz123
1 answer 85 views

With a neat diagram, explain gas engine co-generation system.

asked Sep 23, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 23 views

With a neat diagram, explain back pressure steam turbine co-generation system.

asked Sep 23, 2018 in Energy Conservation And Audit by Shimroz123
2 answers 190 views

With the help of neat sketch, state working principle of rotameter. 

asked Sep 9, 2018 by Shimroz123
1 answer 15 views

With the help of necessary sketch, explain in brief the working of brushless DC motor. 

asked Sep 15, 2018 by Shimroz123
0 answers 21 views

For the use of Newton-Raphson method, the non-linear algebraic equations are made linear with the help of (a) By decoupling the equations (b) Taylor series expansion (c) Exponential distribution (d) Nothing can be said 

asked May 25, 2018 in Numerical methods and programming by Shimroz123
1 answer 16 views

Draw a neat labeled diagram to show protective system for AC traction and give the function of each relay used in it. 

asked Sep 2, 2018 by Shimroz123
1 answer 6 views

Draw a neat labelled diagram of PLC. Explain the function of each block.

asked Sep 2, 2018 by Shimroz123
1 answer 22 views

Describe the concept of leakage flux, useful flux and fringing with neat diagram.

asked Sep 4, 2018 by Shimroz123
1 answer 5 views

Explain working of pressure switch with suitable diagram. State the function of differential setting in pressure switch.

asked Sep 2, 2018 by Shimroz123
0 answers 39 views

Explain the basic operation of an oscilloscope with necessary diagram for each section in detail.

asked Mar 2, 2018 in Digital Instrumentation by Quiz
1 answer 14 views

Explain the role of adequate maintenance of lighting system in energy conservation.

asked Oct 2, 2018 in Energy Conservation And Audit by Shimroz123
1 answer 15 views

Describe with neat labeled diagram measurement of flow using turbine flow meter.

asked Sep 14, 2018 by Shimroz123
1 answer 11 views

Describe with neat diagram working of DC tacho-generator. 

asked Sep 13, 2018 by Shimroz123
2 answers 23 views

What is pyrometry? Describe working of optical pyrometer with neat diagram.

asked Sep 8, 2018 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 inductance loss measure operation connected signal low applications effect single-phase network 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
...