Question

Find equivalent resistance b/w P & Q and find the current passing through $25\Omega$

Answer 1

for solving equivalent resistance we have to start with one side as ,

resistance $6\Omega and14\Omega$ are in series so equivalent resistance is $20\Omega$ , now this is in parallel with $20\Omega$ resistance so equivalent will be $10\Omega$ , which is in series with other $10\Omega$ resistance which gives $20\Omega$,

which again parallel with $20\Omega$ resistance , so finally we get equivalent resistance b/w P& Q, $V_{PQ}=10\Omega$

total resistance in the circuit is $35\Omega$,

So, current passing through $25\Omega$ resistance will be , $I=\frac{70}{35}=2A$