The LED:
1. | is reverse-biased. |
2. | is forward-biased. |
3. | can be made of \(\mathrm{GaAs}.\) |
4. | both (2) and (3) are correct. |
(I) | In forward bias |
(II) | In reverse bias |
(III) | In parallel with the load |
(IV) | In series with the load |
1. | (I) and (II) only |
2. | (II) and (III) only |
3. | only (I) |
4. | only (IV) |
Assertion (A): | The resistance of a photodiode decreases when light having photons of sufficient energy is incident on it. |
Reason (R): | When energetic photons fall on the \(\mathrm{p\text{-}n}\) junction of a photodiode, electron-hole pairs are created due to the breaking of the valence bonds. |
1. | (A) is True but (R) is False. |
2. | (A) is False but (R) is True. |
3. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
4. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |