Question

Calculate the lowest effective resistance that can be obtained by the combination of

three resistors of resistance 4 ohm, 8ohm& 12 ohm​

Answer 1

Answer:

The lowest effective resistance of that can be obtained by the combination of 4Ω, 8Ω & 12Ω resistor is 2.18Ω .

Explanation:

Given:-

R = 4Ω

R" = 8Ω

R"' = 12Ω

We know that when we connect resistors in parallel combination then we get the least value of effective resistance .

Also,

1/Req = 1/R + 1/R" + 1/R"'

= 1/4 + 1/8 + 1/12

= (6 + 3 + 2)/24

= 11/24

Req = 24/11 = 2.18Ω