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Q.
Six equal resistances each of $4 \Omega$ are connected to form a figure. The resistance between two corners $A$ and $B$ is
Current Electricity
Solution:
Equivalent circuit of this combination of resistances is as shown in figure.
The effective resistance of arm
$E G=\frac{4 \times 4}{4+4}=2\, \Omega$
Total resistance between $A$ and $B$ will be
$\frac{1}{R}=\frac{1}{4}+\frac{1}{4}+\frac{1}{4}=\frac{3}{4}$ or $R=\frac{4}{3} \Omega$
