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(B) In a bridge rectifier circuit,the $a.c.$ input is applied across the two opposite junctions that are not connected to the same diode terminals in

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$B, D, A, C$

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(B) In a bridge rectifier circuit,the $a.c.$ input is applied across the two opposite junctions that are not connected to the same diode terminals in a way that would block current. Looking at the diagram,the $a.c.$ input is connected across points $B$ and $D$.During the positive half-cycle,diodes connected to $B$ and $D$ conduct such that current flows through the load connected across $A$ and $C$.During the negative half-cycle,the other pair of diodes conducts,again maintaining the same direction of current through the load connected across $A$ and $C$.Therefore,the $a.c.$ input is connected across $B$ and $D$,and the $d.c.$ output is taken across $A$ and $C$.

For the given circuit shown in the figure,to act as a full-wave rectifier: $a.c.$ input should be connected across .............. and .................,and the $d.c.$ output would appear across ............. and ..................

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