Question

Draw an expression for equivalent resistance in series then resistance r1 , r2 , r3 , are connected series

Answer 1

Answer:

Explanation:

Series combination:

    The combination in which resistors are connected

     end to end is called series combination.

Derivation:

In series combination,the current across all resistors is same.

Consider 3 resistors connected in series.

We know that:

  V = IR

And in series,voltages are different.

So,

V=V1 + V2+ V3

As V = IR

then : I Req= IR1 + IR2 + IR3

Taking current as common,,then above equation becomes:

Req= R1 + R2 + R3

It can be concluded that:

          "In series,simply resistances are added"

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