Question

Match the entries of Column I with their correct mathematical expressions in Column II

Column I		Column II
A	Balanced condition of wheatstone bridge	1	$\frac{R_1}{R_2}=\frac{R_3}{R_4}$
B	Comparison of emf of two cells field.	2	$\frac{R}{S}=\frac{l_1}{100-l_1}$
C	Determination of internal resistance of a cell	3	$\frac{E_1}{E_2}=\frac{l_1}{l_2}$
D	Determination of unknown resistance by meter bridge	4	$r=R\left(\frac{l_1}{l_2}-1\right)$

• A. (A) $\rightarrow$ (4); (B) $\rightarrow$ (2); $C \rightarrow$(3) ; (D) $\rightarrow$ (1)
• B. (A) $\rightarrow$ (1); (B) $\rightarrow$ (3); $C \rightarrow$ (4); (D) $\rightarrow$ (2)
• C. (A) $\rightarrow$ (3); (B) $\rightarrow$ (4); $C \rightarrow$(2) ; (D) $\rightarrow$ (1)
• D. (A) $\rightarrow$(4) ; (B) $\rightarrow$ (3) ; C$ \rightarrow$ (2) ;( D )$ \rightarrow$ (1)

Answer 1

Answer: (B)

Correct answer is (b) (A) $\rightarrow$ (1); (B) $\rightarrow$ (3); $C \rightarrow$ (4); (D) $\rightarrow$ (2)