# NCERT Physics Class 12 Exemplar Ch 14 Semiconductor Electronics Materials Devices and Simple Circuits Part 7 (For CBSE, ICSE, IAS, NET, NRA 2022)

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Q 38 Consider a box with three terminals on top of it as shown in Fig. (a) : Consider a Box with Three Terminals on Top of It

Three components namely, two germanium diodes and one resistor are connected across these three terminals in some arrangement. A student performs an experiment in which any two of these three terminals are connected in the circuit shown in Fig. (b) . A Student Performs an Experiment

The student obtains graphs of current-voltage characteristics for unknown combination of components between the two terminals connected in the circuit.

The graphs are

1. When A is positive and B is negative A is Positive and B is Negative

2. When A is negative and B is positive A is Negative and B is Positive

3. When B is negative and C is positive B is Negative and C is Positive

4. When B is positive and C is negative B is Positive and C is Negative

5. When A is positive and C is negative A is Positive and C is Negative

6. When A is negative and C is positive A is Negative and C is Positive

From these graphs of current – voltage characteristic shown in Fig. (c) to (h) , determine the arrangement of components between A, B and C.

Ans: Graphs of Current – Voltage Characteristic