Equation for equivalent resistance

Asked by Shivraj Raghu | 16th May, 2013, 08:07: PM

Expert Answer:

Let two resistors R1 and R2 be connected in a circuit with voltage V and current flowing I. 
Now, according to the ohms law, the voltage drop across resistor R1 = IR1 and the voltage drop across the second resistor = IR2
Now, since, the total voltage drop in the circuit = V 
Hence, V = IR1 + IR2
Also, lets consider the equivalent resistance in the circuit to be equal to R
Hence, V = IR
SO, IR = IR1 + IR2
R = R1 + R2

Answered by  | 16th May, 2013, 09:27: PM

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