MCQ
For P-type semiconductors, impurity elements are used :
- AArsenic
- BPhosphorus
- ✓Boron
- DBismuth
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| List $I$ | List $II$ |
| $(A)$ Microwave | $(I)$ $400\,nm$ to $1\,nm$ |
| $(B)$ Ultraviolet | $(II)$ $1\,nm$ to $10^{-3}\,nm$ |
| $(C)$ $X-$Ray | $(III)$ $1\,mn$ to $700\,nm$ |
| $(D)$ Infra-red | $(IV)$ $0.1\,m$ to $1\,mm$ |
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