Question

derive an expression for the combination of three resistors connected in series

Answer 1

Explanation:

hope you get ur answer from this ...

Answer 2

Answer:

Rs=R1+R2+R3

Explanation:

Series combination of resistance:

If a number of resistance are joined end to end so that the same current flow through each of them in succession, then the resistances are said to be connected in series

As shown in figure, consider three resistance R1,R2 and R3 connected in series. Suppose a current I flows through the circuit when a cell of voltage V is connected across the combination.

By Ohm's law,the potential differences across the three resistances will be,

V=IR1,

V=IR2,

V=IR3.

If Rs be the equivalent resistance of the series combination,then on applying a potential diffrence V across it, the same current I must flow through it . Therefore,

V=IRs

But V=V1+V2+V3

Therefore. IRs=IR1+IR2+IR3.

OR

Rs=R1+R2+R3