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Deduce the expression for the equivalent resistance of the parallel combination of three resistors R1,R2 and R3
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plase say how to do it?
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Deduce the expression for the equivalent resistance of the parallel co...
Calculation of Equivalent Resistance of Parallel Combination of Three Resistors

To find the equivalent resistance of three resistors R1, R2, and R3 connected in parallel, we can use the following steps:

Step 1: Represent the circuit diagram of the parallel combination of three resistors as shown below:

![image.png](attachment:image.png)

Step 2: Write down the formula for the equivalent resistance of three resistors connected in parallel:

1/Req = 1/R1 + 1/R2 + 1/R3

Where Req is the equivalent resistance of the three resistors R1, R2, and R3 connected in parallel.

Step 3: Simplify the expression by taking the reciprocal of both sides:

Req = (R1 x R2 x R3) / (R1 x R2 + R2 x R3 + R1 x R3)

This is the final expression for the equivalent resistance of the parallel combination of three resistors R1, R2, and R3.

Step 4: Substitute the values of the resistors R1, R2, and R3 in the above expression to obtain the numerical value of the equivalent resistance.

For example, if R1 = 10 Ω, R2 = 20 Ω, and R3 = 30 Ω, then

Req = (10 x 20 x 30) / (10 x 20 + 20 x 30 + 10 x 30) = 6 Ω

Therefore, the equivalent resistance of the parallel combination of three resistors R1, R2, and R3 is 6 Ω.
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