BASIC LAW'S OF ELECTRICITY

Law's of electricity:

Law of Resistance
Law of conductance
Ohm's law
Open circuit
Short circuit
Kirchhoff's law

Kirchhoff's current law

Kirchhoff's voltage law

7.Law of Electromagnetic induction

Faraday's law of electro magnetic induction

Lenz's law of Electro magnetic induction

8.Flemings rules.

Right hand rule

Left hand rule

9.Current Division
10.Voltage division

There are still some laws but 1st lets complete all these 10 laws...out of these 10...we have already seen law of resistance,conductance and ohm's law and now coming to open circuit and short circuit

Open circuit:

A circuit is said to be open circuited when the terminals which are parallel to its voltage source,are not connected to each other or in other word the terminals are left open.In this case the current flowing through the circuit is zero as the terminals are open and Resistance of the circuit is infinity

I=0

R=infinity

Short circuit:

A circuit is said to be short circuited when the terminals which are in parallel to its voltage source are connected or closed.In this case the Resistance of the circuit is zero and the current in the circuit is infinite as the terminals are closed.

I=infinity

R=0

But the value of current is limited to the current supplied by the source.

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GENERATOR

GENERATOR: A Generator is a machine which converts Mechanical energy into Electrical energy.These are widely used inside the Power plants for the generation of Power. Generator In general the Generator we see in a Thermal power plant gains its mechanical energy from the Turbine connected to it and this mechanical energy is thus converted into the required Electrical energy by the Generator.I myself experienced a 15 days of internship in a Thermal power plant and the Generator was about the size of a lager hall both in its length and breadth and the output Electrical energy is thus achieved by the use of a Generator.

SWITCHING TRANSIENTS IN TRANSFORMER

Switching Transients: The word Transients is always very Scary for me but not any more hahaaa...........what about you???? Well coming to the point...why do these Switching Transients occur in a Transformer. When the switch is closed when the voltage is maximum...then the flux required by the core is zero and the available flux in the core is also zero and hence NORMAL OPERATION is sufficient When the switch is closed when the voltage is crossing zero...then the flux required by the core is maximum but here the avaliable flux in the core is zero and hence TRANSIENT OPERATION is required Here when the Transient operation takes place then the flux doubles gradually and this is known as Doubling Effect of Transformer.This Doubling Effect causes magnetic in rush current and Damage in the insulation. Using Secondary Harmonic Restraining Coil can reduce all these Drawbacks.

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