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Electronics questions

Electronics questions | form six Physics

Find Electronics examination questions, form six Physics in acaproso.com

# Question
1

List three types of transistor configurations.


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2

Why is collector of a transistor made wider than emitter and base?


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3

A change of 100μA in the base current produces a change of 3mA in the collector current.
Calculate:
(i) The current amplification factor, β
(ii) The current gain, α


Mathematical Calculation
4

What is the importance of doping as applied to semiconductors?


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5

Distinguish between ​ n–type ​ and ​ p–type ​ semiconductors. Give three points.


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6

Why are transistors mostly used in common emitter arrangement?


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7

When does a transistor amplifier work as an oscillator?


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8

Explain the use of an op-amp as a summing amplifier.


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9

Figure 2 is an operational amplifier circuit where ​ R1=39​kΩ, R2=4.7kΩ, R3=10​kΩ and R4=2.7kΩ.

Figure 2 is an operational amplifier circuit where ​ R ​ 1 = 39​ k Ω , ​ R 2 ​ = 4.7​ k Ω , ​ R 3 ​ = 10​ k Ω and R 4​ ​ = 2.7​ k Ω .

Calculate the output potential ​V0 given that the input voltage ​V1=4.0V, V2 = −2.5​V and
V3​=1.5​V.
.


Mathematical Calculation
10

Name three electronic circuits in which multivibrators can be constructed.


Short answers