12th Hindi Literature

ELECTRICITY AND ELECTRONICS Sample Paper

ELECTRICITY AND ELECTRONICS Sample Paper
(Maximum Marks: 100)
(Time allowed: Three hours)

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PART I (40 Marks)
Answer all questions.

ELECTRICITY AND ELECTRONICS
ELECTRICITY AND ELECTRONICS Sample Paper

Question 1
Explain the construction of a vacuum diode. [4]

Question 2
Briefly explain what is the effect of temperature on semiconductors: [4]
(a) at absolute zero.
(b) above absolute zero.

Question 3
With the help of a neat circuit diagram, explain the working of a semiconductor diode, as a full-wave rectifier (using two diodes). [4]

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Question 4
Draw the symbol used for each of the following &

label its part [4]

(a)Triode valve

(b)Transistor (pnp or npn)

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