Question

Derive laws of resistance in series so as to explain equivalent resistance of circuit about 3 mark ans.​

Answer 1

Explanation:

Laws of Resistance are further classified into two types-:

1. Law of resistance in Parallel, and
2. Law of resistance in Series.

Law of resistance in Series:

Suppose there is a diagram of three resistors connected in series.

R1, R2 and R3 are the three Resistors.

I is the current in the circuit.

V is the voltage of the circuit.

    By applying OHM's law in all the resistors we get

1. V1 = I R1  ,
2. V2 = I R2  ,and
3. V3 = I R3

The total potential difference in the circuit is V, so

          V = V1 + V2 + V3                                   : [V=IR]

         IR = IR1 + IR2 + IR3

         I(R) = I(R1 + R2 + R3)                                : [ Taking I as common ]

       Therefore;  R = R1 + R2 + R3   or Equivalent Resistance

Answer 2

Answer:

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Explanation: