Question

Derive the expression for equivalent resistance in series and parallel connection

Answer 1

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Answer 2

Answer:

We know in parallel current (I) is divided (p.d) itemains same

current across the circuit is given by

I =I1+I2+I3

Therefore v is same across A and B are they are connected in series

I=v/R1+v/R2+v/R3

We know I=V/R

V/R=V/R1+V/R2+V/R3

V/R=V(I/R1+I/R2+I/R3 )

I/RP=I/R1+I/R2+I/R3

WHERE RP IS RESISTANCE PARALLEL

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