Question

three resistance R1,R2,R3 are connected in parallel show that their equivalent resistance is 1/R = 1/R1 + 1/R2 + 1/R3​

Answer 1

Answer:

V = I1R1

V = I2R2

V = I3R3

I = I1+I2+I3

I = v/R1 +V/R2 +V/R3

V/ R = V/R1 +V/R2+V/R3

1/R = 1/R1 +1/R2+1/R3

Answer 2

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refer to the Attachment .

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