Question

derive the formula of resistances (R1 R2 & R3) which are connected in parallel

Answer 1

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The formula of resistances which are connected in parallel is

1/R1+1/R2+1/R3=1/total resistance

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Answer 2

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Here is Your Answer....!!!!!
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〽↖Actually welcome to the concept of the Current Electricity.....

〽↖Basiclly we know that. ...When the Resisters are connected in parallel .....The Resisters have same potential difference across them ....

〽↖Thus in the PARALLEL CONNECTION. .there is variance of the Current across the Resisters. ...

〽↖Thus we obtain that. ....

⤵⤵〽↖Ip = I1 + I2 + I3 ............In.

〽↖total current across the circuit is equal to the sum of the Current across all the Resisters In the circuit ....

⤵⤵thus we know I = V / R ....

〽↖since here V is same all over we get .....

⤵⤵↖V/Rp = V/R1 + V/R2 + V/R3 ..........+ V/Rn

〽↖↖Cancelling V effect from both the sides we get The formula for the Equivalent resistance for parallel type connection. ...

〽⤵⤵〽1/Rp = 1/R1 + 1/R2 + 1/R3 ........1/Rn...

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