Technical Basics
Q10. Units and abbreviations multiples and sub-multiples - what is current
- difference between conductor and insulator - materials for conductors and
insulators and where water fits in - P = V x I - V = I x R - Series and parallel
resistors and numeric values of 2 or 3 resistors in series or parallel (
parallel equal values only).
Q11. Cells and batteries - primary and secondary - what is a cell and what
is a battery
Q12. Capacitors - what they are - how they store a charge - effect with DC
and AC - proper connection of some capacitors
Inductors - what it is - what happens when a current passes through it -
ability to store magnetic field - the effect of different size of inductor
Q13. Tuned circuits - What it is - how it works in relation to resonant frequency
-accept of current and rejection of current
Q14. Simple transformer - the need for AC and does not work with DC - Step
down and step up
Q15. Diodes and Transistors - diode conduction - Diode used to produce DC
from AC - recognise wave forms AC and rectified pulsed DC - What is an LED
and how it works - What is a varicap and how it works -
Q16. Transistor - used as an amplifier and a switch and oscillator - controlled
by the base current - be able to recognize the crystal oscillator and the
variable frequency oscillator circuit diagrams
Q17. Circuit symbols - Measurements - use of multimeter and important of
polarity with analogue meter - how to measure volts - how to measure current
- how to work out the power in a circuit - the RF power out is less than
DC input due to inefficiency.
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