Question

can anyone please answer my question

Answer 1

let PA=6Ohm
AB=14ohm
BQ=10ohm
PA and AB are in series then,
total resistance R =6+14=20ohm
AND this resistance R is parallel to the resistances of 20 ohm then,they will give a Resistance(let it be X) of
1/X=1/20+1/20
X=20/2=10ohm
and this resistance X is in series with the resistances of 10 Ohm
then, the new resistance Y=10+10=20 Ohm
Y is parallel to the resistances PQ
Total resistance of the circuit Rt
1/Rt =1/20+1/20
Rt =20/2=10ohm
hence total resistance =10 ohms
let I be the current flowing through the resistances of 25 Ohm
V=70v
I=V/R
I=70/25+10[ since the resistances are in series ]
I=70/35
I=2 Amperes