Ics2100:Electronics Question Paper
Ics2100:Electronics
Course:Bachelor Of Information Technology
Institution: Meru University Of Science And Technology question papers
Exam Year:2014
(a) Differentiate between intrinsic and extrinsic semi conductors. (6 Marks) (b) What is a p-n junction? (2 Marks) (c) State three uses of Zener dioxides. (3 Marks) (d) A transistor has a collector current of 2MA. If the current gain is 135, what is the base current? (4 Marks) (e) With the aid of a graph, explain the variations of current with voltage for a function diode. (6 Marks) (f) The following current readings are obtained in a transistor connected in C-B configuration. IE = 2MA and IB = 20??A. Compute the values of ? and IC. (5 Marks) (g) Define the following terms in relation to OP-AMPS. (i) output impedance (2 Marks) (ii) transition frequency (2 Marks)
QUESTION TWO – (20 MARKS)
(a) Name two types of transistors. (2 Marks) (b) Define the following terms: (i) Base transport factor (2 Marks) (ii) Current gain (2 Marks) (c) Prove that ? 1-? = ?? where ?? in the current gain of a BJT (8 Marks) (d) A transistor has a collector current of 10MA and a base current of 40??A. Calculate the current gain of the transistor. (6 Marks)
QUESTION THREE – (20 MARKS)
(a) (i) What is a Zener diode? (4 Marks) (ii) Find out if the Zener diode in the figure below is properly biased. Explain. (6 Marks)
500?
6V
Vz = 10V
Iz Max = 6mA (b) Sketch and explain a JFET drain characteristic when VGS = 0 (10 Marks)
QUESTION FOUR – (20 MARKS)
(a) Define the following terms:
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