AQA Electronic Products

Exam Format

AQA :WRITTEN EXAM PAPER 2011

TIME: 1.5 HOURS

USE BLACK INK

USE PENCIL FOR DRAWING

tips

• Have a calculator and pencil for exam• Always read each question right through before

answering.• Try to avoid one word answers.• Use a pencil for all drawings• Never give two answers when one is required.• Look at the number of marks and the space allocated

for each question• Use all the space provided. If the space is provided it

is likely a good answer will fill the space.• Do not rush questions – think carefully before writing

answers• Make sure all sketches are labelled• Attempt all questions, you may pick up marks

FORMULA’S – given on paper

UNIT 1: WRITTEN PAPER

• MATERIALS AND COMPONENTS –• SYSTEM DIAGRAMS - CIRCUIT SYMBOLS –

BATTERIES & DIODES – RESISTORS – CAPACITORS

• INPUTS – PROCESSES - OUTPUTS• THYRISTORS – OP AMPS – LOGIC GATES –

TIMERS(MONOSTABLE & ASTABLE) - FLOWCHARTS – LEDS – TRANSISTORS

• DESIGN & MANUFACTURE• CASING – MAKING PCB’S – DESIGN

CONSIDERATIONS

EXAMPLE QUESTIONS ON COMPONENTS

OBJECTIVES: RECOGNISE THE SYMBOLS FOR ELECTRICAL COMPONENTS USED IN CIRCUIT DIAGRAMS

EXAMPLE QUESTIONS ON RESISTORS & LED’S.

OBJECTIVE:EXPLAIN HOW RESISTORS ARE USED & DETERMINE THE VALUE OF FIXED & COMBINATION RESISTORS

EXPLAIN HOW AN LED IS USED & POSTIONED WITH THE CORRECT POLARITY

EXAMPLES QUESTIONS ON TRANSISTORS:

OBJECTIVES:

EXPLAIN THE OPERATION OF TRANSISTORS

COMMON USES & FUNCTIONS: DARLINGTON PAIRS

EXAMPLE QUESTION ON PCB MANUFACTURING

OBJECTIVES:

EXPLAIN THE ADVANTAGES/DISADVANTAGES OF USING COMPUTER SOFTWARE

IDENTIFY KEY TERMINOLOGY

EXAMPLE DESIGN QUESTIONS: DESCRIBE HOW AN ENCLOSURE CAN BE BUILT – HOW TO SECURE COMPONENTS

EXAMPLE QUESTIONS: SYSTEMS APPROACH

OBJECTIVES:

EXPLAIN WHAT A SYSTEM IS

LIST PARTS OF A SYSTEM DIAGRAM

EXPLAIN HOW IT IS USED

INPUT – PROCESS - OUTPUT

EXAMPLE QUESTIONS ON ASTABLE CIRCUITS:EXPLAIN THE FUNCTION – CALCULATE THE MARK/SPACE RATIO – DESRCIBE THE CONFIGURATION

EXAMPLE QUESTIONS ON MONOSTABLE: EXPLAIN THE FUNCTION – CALCULATE THE TIME CONSTANT – EXPLAIN WHY A PULL UP RESISTOR IS USEDE:

EXAMPLE DESIGN CONSIDERATIONS QUESTIONS: EXPLAIN RESPONSIBLE DESIGNS – MAINTENACE – RECYCLING – ENVIRONMENTAL ISSUES