Question

Derive an expression for equivalent resistance in series when resistant r1 , r2 , r3 , are connected series

Answer 1

Explanation:

In Series connection current remains same and voltage gets divided.

so,

V eq. =V1+V2+V3

R=V/I

V1=IR1

V2=IR2

V3=IR3

V eq. = I(R1+R3+R3)

R eq.= V eq./I

R eq. = I(R1+R2+R3)/I

R eq. = R1+R2+R3