Question

what is the minimum resistance which can be made using 5 resistors each of 1/5 ohm​

Answer 1

1/25 ohms

Explanation:

for minimum resistance means parallel circuit therefore

the resistors is of 1/5 ohms

we know 1/Rp= 1/r1+ 1/r2........1/rn

1/Rp= 5+5+5+5+5

1/Rp= 25

Rp= 1/25 ohms

Answer 2

Answer:

1/25 ohm

Explanation:

Connect all resistors in parallel combination .

In parallel combination,

1/R(net) = 1/R1+1/R2+1/R3+1/R4+1/R5

= 1/1/5+1/1/5+1/1/5+1/1/51/1/5

= 5+5+5+5+5=25

1/R(net)=25

∴R(net)= 1/25 ohm