Question

In the circuit shown, the effective resistance between the points a and bis
622
1822
160
a
b
180
30
522
62
100​

Answer 1

THE FIGURE GIVEN ABOVE IS A WHEAT STONE BRIDGE SO THE 6 OHM RESISTOR IN THE MIDDLE IS INEFFECTIVE AND WE HAVE TO NEGLECT THAT RESISTOR.

SERIES:

THE TOP 6 OHM AND 18 OHM RESISTORS ARE IN SERIES CONNECTION SO THEY ADD UP TO 24 OHMS

SAME WITH THE 18 OHM AND 6 OHM RESISTORS IN THE BOTTOM AND THE THEY ADD UPTO 24 OHMS.

PARALLEL:

NOW THE 24 OHM RESISTOR UP AND DOWN ARE IN PARALLEL CONNECTION SO,(1/24)+(1/24)=12 OHMS

THEREFORE EFFECTIVE RESISTANCE=12 OHMS