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The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section and same material is $0.25\ \Omega$. What will be the effective resistance if they are connected in series?
A
$0.5\ \Omega$
B
$1\ \Omega$
C
$4\ \Omega$
D
$0.25\ \Omega$
Detailed Solution
In parallel: $R_{eq} = \frac{R}{4} = 0.25\ \Omega \Rightarrow R = 1\ \Omega$ (each wire)
In series: $R_{series} = 4R = 4 \times 1 = 4\ \Omega$