Question

Three resistance 15 ohm,20 ohm,and 10 ohm are connected in parallel. Find the effective resistance of the circuit.

Answer 1

R1 = 15 ohm

R2 = 20 ohm

R3 = 10 ohm

In Parallel combination

1 / Equivalent Resistance = 1/R1 + 1/R2 + 1/R3

=> 1/ Req = 1/15 + 1/20 + 1/10

=> 1/ Req = (4+3+6)/60

=> 1/ Req = 13/60

=> Req = 60/13

=> Equivalent Resistance = 4.6 ohm

Answer 2

Hello friend
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Let's write the given

R1 = 15 ohm

R2 = 20 Ohm

R3 = 10 ohm.

We have to find the effective resistance in parallel (Rp) = ??

So,we know that,

1/Rp = 1/R1 + 1/R2 + 1/R3

By putting the value,

1/Rp = 1/15 + 1/20 + 1/10

1/Rp = 4 + 3 + 6/60

1/Rp = 13/60

Rp = 60/30

Rp = 4.615 ohm approximately.

Therefore, the effective resistance in the circuit is 4.615 ohm .

Thanks.