Question

If $ {{D}_{e}},\text{ }{{D}_{b}} $ and $ {{D}_{c}} $ are the doping levels of emitter, base and collector respectively of a transistor, then:

• A. $ {{D}_{e}}={{D}_{b}}={{D}_{c}} $
• B. $ {{D}_{e}}<{{D}_{b}}={{D}_{c}} $
• C. $ {{D}_{e}}>{{D}_{b}}>{{D}_{c}} $
• D. $ {{D}_{e}}<{{D}_{b}}<{{D}_{c}} $
• E. $ {{D}_{e}}>{{D}_{c}}>{{D}_{b}} $

Answer 1

Answer: (E)

In transistor emitter is heavily doped and base is lightly doped.
So, $ {{D}_{e}}>{{D}_{c}}>{{D}_{b}} $