Question

The equivalent resistance of a group of resistances is $R$. If another resistance is connected in parallel to the group, its new equivalent becomes $R_{1}$ and if it is connected in series to the group, it new equivalent becomes $R_{2}$. Then

• A. $R_{1} > R$ or $R_{2} > R$
• B. $R_{1} < R$ or $R_{2} > R$
• C. $R_{1} > R$ or $R_{2} < R$
• D. $R_{1} < R$ or $R_{2} < R$

Answer 1

Answer: (B)

In parallel combination the equivalent resistance is less than the two individual resistances connected and in series combination equivalent resistance is more than the two individual components.