Question

Two resistance are joined in parallel and series. Find the ratio of resistance and heat produced

Answer 1

Suppose the two resistances are R1 and R2.According to question,1R1+1R2=12Or R1+R2R1R2=12Or R1R2R1+R2=21−−−−−(i)AndR1+R2=9Or R1=(9−R2)Putting in (i),R1R2R1+R2=21 or (9−R2) R29=219 R2−R22=18Or R22−9R2+18=0Or R2=6 ohm or 3 ohmFor R2=6=>R1=3 ohmFor R2=3 ohm=>R1=6 ohm