Question

How could two wires of resistances, 8ohms and 4 ohms be connected in a circuit,so as to obtain an effective resistance of 2ohms.

Answer 1

Answer:

for getting effective resistance 2 ohm we should connect 8 ohm resistor and 4 ohm resistor in parallel to each other

1 / Req = 1 / 8 + 1 / 4 = ( 1 + 2) / 8 = 3 / 8

Req = 8 / 3= 2.6 ohm ..

in approx u can say effective resistance is 2 ohm