Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be [IIT-JEE 1989]

In the circuit (1) and (2)

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In the circuit (2) and (3)

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In the circuit (1) and (3)

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Only in the circuit (1)

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Solution

The correct option is B
In the circuit (2) and (3)

Because in case (1) N is connected with N. This is not a series combination of transistor.

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Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be [IIT-JEE 1989]

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Two PN-junctions can be connected in series by three different methods as shown in the figure. If the potential difference in the junctions is the same, then the correct connections will be [IIT-JEE 1989]

The correct option is B In the circuit (2) and (3)Because in case (1) N is connected with N. This is not a series combination of transistor.

The correct option is B
In the circuit (2) and (3)

Because in case (1) N is connected with N. This is not a series combination of transistor.