Question

Plz show workin also

Ans d

Answer 1

In parallel connection potential difference same so your is (c) 0

Answer 2

10 and 20 ohom are in series,
so the equivalent resistance is =10+20=30ohom.
10 and 5 ohom are in series,
so the equivalent resistance is=10+5=15ohom
15 and 30 ohom are in parallel,
so the equivalent resistance is=(15×30)/(15+30)=10ohom,
the current of the circuit is 30/10=3A,
current through A point is 15/45 ×3=1A,
and through B point is 2A,
potential at A point is 30×1=30V and at B point is 15×2=30V,
potential difference between A and B is (30-30)=0V