Question

State Kirchhoff’s rules and explain on what basis they are justified.

Answer 1

Kirchhoff's first rule :-

It state that, the sum of the currents flowing towards a junction is equal to the sum of currents leaving the junction

Kirchhoff's second rule :-

It state that the algebraic sum of all potential drops and emfs along any closed path in a network is zero.

JUSTIFICATION :--

first law(junction rule) :--

Alternatively ➡️ δi = 0

JUSTIFICATION = conservation of charge.

second law (loop Rule) :--

Alternatively ➡️ ΔV : 0, where ΔV is the change in potential.

JUSTIFICATION = conservation of energy.

hope it help ✌️

Answer 2

Answer:   heyyy

Explanation:

.

Kirchhoff's first rule ( Kirchhoff's Current Law or KCL or Junction Rule) :

It state that, the sum of the currents flowing towards a junction is equal to the sum of currents leaving the junction.

This is in accordance with the conservation of charge which is the basis of Kirchhoff's current rule.

For eg. :I  

1

​

+I  

2

​

+I  

3

​

−I  

4

​

−I  

5

​

=0

"In any electric network, the algebraic sum of currents meeting at a junction is always zero".

∑ I =o

Kirchhoff's second rule ( Kirchhoff's Voltage Law or KVL Loop rule ) :

It state that the algebraic sum of all potential drops and emfs along any closed path in a network is zero.

OR

The algebraic sum of the emfs in a loop of a circuit is equal to the algebraic sum of the product of current and resistances in it.

Mathematically, the loop rule may be expressed as :

∑ E = ∑IR

Kirchhoff's second law express the conservation of energy.