Question

solve this query plz
IRRELEVANT ANSWERS WILL BE REPORTED

Answer 1

Explanation:

Current in wire XY by 12 V battery

I=V/R=12/10+10=12/20=3/5 A

Now potential drop across wire XY

V=IR=3/5×10=6 V

Now potential gradient-

K=V/L=6/1= 6 V/m

Now current in cell of 1.5 V

I=1.5/2=3/4 A

L=V/K=1.5 / 6=25 cm