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Dear Student
Following are two rules

Kirchhoff’s First Law − Junction Rule

  • The algebraic sum of the currents meeting at a point in an electrical circuit is always zero.

I1I2 I3, and I4

Convention:

Current towards the junction − positive

Current away from the junction − negative

I3 + (− I1) + (− I2) + (− I4) = 0
 

Kirchhoff’s Second Law − Loop Rule

  • In a closed loop, the algebraic sum of the emfs is equal to the algebraic sum of the products of the resistances and current flowing through them.

For closed part BACB,

E1  E2 = I1R1 + I2 R2  I3R3

For closed part CADC,

E2 = I3R3 + I4R4 + I5R5


Now using them we write equation for the circuit given as follows


Regards

 

 

 
 

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