Basic electronics
Previous year question paper with solutions for Basic electronics Dec-2017
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Question paper 1
SECTION-A
Q1. Fill in the blanks.
a. The input impedance of a FET is __________than that of BJT.
Answer:
b. ICEO = _______________ICBO.
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c. The process of adding impurities is called ____________.
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d. The turn on voltage in a silicon diode is _________.
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e. A zener diode is always operated in ___________region.
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f. Holes are _______carriers in N-type semiconductors.
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g. When the gate terminal of MOSFET is positive it is said to operate in _______.
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h. The unit of hie is______.
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i. In a transistor there are____________ PN junctions.
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j. The point of intersection of dc and ac load line is called__________
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SECTION-B
Q2. Attempt any five questions.
i. What is ripple factor? How it can be minimized?
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ii. Explain zener diode as a voltage regulator.
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iii. Explain intrinsic and extrinsic semiconductors.
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iv. Give construction and working of MOSFET.
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v. Explain the working of half wave rectifier.
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vi. Draw the circuit diagram of CE amplifier. Explain briefly.
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vii. What do you mean by h parameters of a transistor? Explain briefly.
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SECTION-C
Q3. Attempt any three questions.
a. Explain construction of NPN transistor. Explain how it can be used as amplifier
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b. Discuss energy band structure for insulators, semiconductors and conductors.
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c. Write a short note on (any two)
i. Filter circuits
ii. AC and DC load line
iii. Avalanche breakdown
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d. What are various transistor biasing circuits? Compare their advantages and disadvantages.
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e. With the help of a diagram, explain the working of a bridge rectifier.
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