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(B) In the given circuit,all four resistors of $4 \ \Omega$ are connected between the same two points $A$ and $B$. By observing the circuit diagram,on

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$1$

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(B) In the given circuit,all four resistors of $4 \ \Omega$ are connected between the same two points $A$ and $B$. By observing the circuit diagram,one end of each resistor is connected to point $A$,and the other end is connected to the outer loop which is entirely at the potential of point $B$. Therefore,all four resistors are in parallel combination. The equivalent resistance $R_{	ext{eq}}$ for $n$ resistors of equal resistance $R$ in parallel is given by $R_{	ext{eq}} = \frac{R}{n}$. Here,$R = 4 \ \Omega$ and $n = 4$. Thus,$R_{	ext{eq}} = \frac{4}{4} = 1 \ \Omega$.

Calculate the equivalent resistance across $A-B$ in the given circuit. ............... $\Omega$

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