Electric discharge phenomenon, Mechanical Engineering

Assignment Help:

ELECTRIC DISCHARGE PHENOMENON

The flow of electricity through metallic solids, or through liquid metals is called Conduction.

The electricity  flow through ionic solutions (such as NaCI) gives rise to the phenomenon called Electrolysis

The flow of electricity through gas (ionised) is called as "Electric Discharge".

There are many types of electric discharges. For example, there is an electric discharge that is taking place inside a fluorescent tube, neon signs, etc.

If we connect the resistor (R) to a power source of voltage (V) then the current (I) drawn by the resistance will be equal to I = V/R. (Ohm's Law).

Since, the cross section is uniform, the resistance per unit length is also uniform. Hence potential distribution along the length is linearly sloping down from V at the end connected to positive and comes down to zero at the end connected to negative. Similarly, we can find out the potential distribution along the arc column. We know that it will be difficult to measure the potential distribution along the arc column, because of the very high temperatures (about 3000 to 10000 ° C). We will require special probes to withstand the temperatures and some special equipments and methods. Nevertheless scientists have done this work and they have found out a surprising result.

The potential drops heavily near the anode and cathode. The regions over which there is a large voltage drop near the anode and cathode are called anode region and cathode region respectively. It is also surprising to note that the length of anode and cathode regions are very small of order of 0.01 mm and less. Since, the same current is flowing across the arc, the power that is developed near the  anode and cathode are considerably  higher, as the voltage drop near the anode and cathode are high.

                Pa = Va X I(power at Anode)
                PK = VK X I(power at Cathode)

                Va= Anode drop
                VK = Cathode drop

The power or heat is responsible for the heating and subsequent melting of the electrodes.


Related Discussions:- Electric discharge phenomenon

Ice engine, of which material parts of ice engine are made?

of which material parts of ice engine are made?

Define application of drilling machine, Application of Drilling machine ...

Application of Drilling machine Drilling machines of dissimilar capacity and configuration are basically used for originating cylindrical holes and occasionally for enlarging t

Derive mathematical equation for bernoulls equation, Derive mathmatical equ...

Derive mathmatical equation for Bernoull's equation, what are the application of Bernoull's equation and illustrate any one.

(APPLIED THERMODYNAMICS, AA steam power plant operates on a reheat Rankine ...

AA steam power plant operates on a reheat Rankine cycle. Steam enters the high-pressure turbine at a pressure of 12.5 MPa and temperature of 550 oC at a rate of 15 kg/s. It leaves

Bearing materials, Bearing Materials Generally it can be said as a good...

Bearing Materials Generally it can be said as a good bearing material must posse following characteristics as: It must be strong enough to sustain bearing load. It

Hardness of water, hardness of bore well water is less than sea water .ju...

hardness of bore well water is less than sea water .justify

Fuels and lubrication technology, minimum mass of air required for complete...

minimum mass of air required for complete combustion of the HFO

Welding of pressure parts in boilers, This section covers welding of pressu...

This section covers welding of pressure parts including those non-pressure parts when welded to pressure parts. All welding design functions necessary within the contract shall be

Operation and maintenance of airport facilities, Operation and maintenance ...

Operation and maintenance of airport facilities: The operation and maintenance of airport facilities is very important for ensuring safety, convenience and economy. Air Traffi

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd