Match List I with List II
| LIST I | LIST II |
| A. Photodiode | I.  |
| B. Junction diode | II.  |
| C. Zener diode | III.  |
| D. Solar cell | IV.  |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A-IV, B-I, C-II, D-III
Each device is recognised by the part of its I-V characteristic in which it works: forward bias (first quadrant), reverse bias (third quadrant) or as a source of power (fourth quadrant).
A. Photodiode — this matches IV, the curve in the third quadrant. A photodiode is operated in reverse bias; the small reverse current grows with the intensity of the light falling on it.
B. Junction diode — this matches I, the curve in the first quadrant. The current stays small up to the threshold voltage and then rises steeply, the usual forward characteristic.
C. Zener diode — this matches II, the curve with a sharp breakdown in reverse bias. At the Zener voltage the reverse current rises suddenly while the voltage stays nearly constant.
D. Solar cell — this matches III, the curve in the fourth quadrant marked \( V_{oc} \) and \( I_{sc} \). A solar cell gives out power, so its curve lies where the voltage is positive and the current negative.