Posted by satya on .
three resistances of value 1 ohm, 2 ohm and 3 ohm are connected in parallel.If the
effective resistance of the circuit has to be 1 ohm, the value of the resistance to be connected in series to this circuit should be?
PLZZZZZZZZZZZZZZ ANSWER URGENTTTTT

physix 
Steve,
1/R = 1/1 + 1/2 + 1/3 = 11/6
So, the parallel resistance is 6/11 ohm.
Add 5/11 ohm to make the total 1 ohm.