Question
- Name the type of a diode whose characteristics are shown in Fig. (A) and Fig. (B).
- What does the point P in Fig. (A) represent?
- What does the points P and Q in Fig. (B) represent?
✓
Answer
- Fig. (a) represents the characteristics of Zener diode and curve (b) is of solar cell.
- In fig. (a), point P represents Zener breakdown voltage.
- In fig. (b), the point Q represents zero voltage and negative current. Which means the light falling on solar cell with atleast minimum threshold frequency gives the current in opposite direction to that due to a battery connected to solar cell. But for the point Q the battery is short circuited. Hence it represents the short circuit current.
And the point Pin Fig. (b) represents some open circuit, voltage on solar cell with zero current through solar cell.
It means, there is a battery connected to a solar cell which gives rise to the equal and opposite current to that in solar cell by virtue of light falling on it.
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