This video is for UPTGT Science / UPTGT Physics Aspirants.
This video contains Unit 3 Electricity.
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This video is Part 4 and Contains following topic's Explanations.
Kirchhoff’s Laws:-
To solve complex circuit.
Given by Gustav Kirchhoff in 1842.
First Law or Junction Law:-
The algebraic sum of currents meeting at a point in electric circuit is zero.
Second Law or Voltage Rule:-
In a closed part of an electrical circuit, the algebraic sum of the products of the resistances and currents flowing through them is equal to emf of that part.
It is also known as loop rule.


Faraday’s First Law
When an electric current is passed through an electrolyte, the amount of substance deposited is directly proportional to the quantity of electric charge.
If ‘W’ is the mass of substance deposited by passing Q coulomb of charge, then Acc. to Faraday’s Ist Law:
W ∝ Q --(1)
A coulomb is quantity of charge when 1 A of current passing for 1 second.
Q = i x t
W ∝ i x t --(2)
W = Z x i x t

2- Faraday’s Second Law
When the same quantity of charge is passed through different electrolytes, then the masses of different substances deposited at the respective electrodes will be in the ratio of their equivalent masses.

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