1.

Two wires of same metal have the same length but their cross-sections are in the ratio \[3:1\]. They are joined in series. The resistance of the thicker wire is \[10\,\Omega \]. The total resistance of the combination will be        [CBSE PMT 1995]

A.                    \[40\,\Omega \]
B.                                      \[\frac{40}{3}\Omega \]
C.                    \[\frac{5}{2}\Omega \]    
D.            \[100\,\Omega \]
Answer» B.                                      \[\frac{40}{3}\Omega \]


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