Page 554 - SUBSEC October 2017_Neat

UNIT 2
MODULE 2: A C THEORY AND ELECTRONICS (cont’d)

SPECIFIC OBJECTIVES EXPLANATORY NOTES SUGGESTED PRACTICAL
ACTIVITIES

The p-n Junction Diode (cont’d)

Students should be able to:

2.5. discuss the I-V characteristic Mention some applications Use the diode in a circuit
of the p-n junction diode; of diodes and show how with multimeters and a
these simple characteristics suitable power source to
lead to these applications. investigate the IV
characteristics.

2.6. recall that junction Draw diagrams showing the Perform experiments to
transistors consisting of two arrangement of the demonstrate qualitatively
back-to-back diodes are semiconductor types and the operation of the
manufactured as either n-p-n the labelled circuit symbol transistor as a switch or
or p-n-p; for each type of transistor. amplifier, that is, at cutoff/
saturation and the active
regions.

2.7. use the diode for half-wave
rectification;

2.8. recall the arrangement of the Description of the flow of
ac supply, transformer and current through the
bridge rectifier diodes in a individual diodes in a bridge
power supply circuit; rectifier circuit.

2.9. represent half-wave and full-
wave rectification
graphically; and,

2.10. discuss the use of a capacitor Include significance of the Set up a simple bridge
for smoothing a rectified ac time-constant RC. rectifier circuit with
wave. capacitor smoothing,
measure and record the
shape and magnitude of
voltages at important points
in the circuit.

CXC A16/U2/17 54