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Q1— Section header —
1.1Choose an item from COLUMN B that matches a description in COLOMN A. Write only the letter (A O\next to the question number (1.1.1
1.1.10\in the ANSWER BOOK. COLUMN A COLUMN B
1.1.10An atom that has five valence electrons Majority charge carriers of type materials Used to measure specific
1.2FIGURE 1 Refer to FIGURE and calculate:
1.2.1The total resistance of the parallel combination (4\
1.2.2The total resistance of the series combination (2\
1.2.3The total resistance of the circuit (3\
1.2.4The current flow through the entire circuit (3\
1.2.5The voltage drop across the parallel combination (3\
1.2.6The power dissipated by the parallel combination (3\
1.2.7The colour code of R hich has a tolerance of 2% (4\
1.2.8The current flow through R (3\ [35]35
Q2— Section header —
2.1A single phase step up tra nsformer has a turns ratio of 5 25 and is connected to a
2.1.1The current that flows in the secondary winding
2.1.2The secondary voltage
2.1.3State THREE faults that could occur with the transformer described in QUESTION
2.1
2.2Sketch the IEC symbol s for the following electronic components
2.2.1Electrolytic capacitor
2.2.2Variable inductor
2.2.3Pre set resistor
2.2.4Transformer
2.2.5Zener diode
2.2.6Fixed resistor (6 1\ (6\
2.3Name the unit of measuremen t for the following properties:
2.3.1Resistance
2.3.2Inductance
2.3.3Capacitance
2.3.4Potential difference
2.3.520
Q3— Section header —
3.1Draw a fully labelled circuit diagram of a bridge rect ifier circuit. how the filter capacitor
3.2Name FOUR factors that ha ve an influence on resistance. (4\
3.3Wave forms are classified according to their shapes. Draw the wave forms of the following:
3.3.1A square wave
3.3.2A saw tooth wave
3.3.3
3.4.1 State THREE advantages of a digital multimeter (3\
3.4.2 State TWO disadvantages of an analogue multimeter. (2\ [25] 808064125
4.1Various options are given as possible answers to the following questions. Choose the answer and write only the letter (A \next to the question number (4.1 .1
4.1.10in the ANSWER BOOK.
4.1.1Polarisation of carbon the zinc plates become weak. oxygen bubbles form in the electrolyte. electrons move from the carbon rod to the zinc plate.
4.1.2galvanometer. multimeter. clamp meter. hydrometer.
4.1.3it has no error of parallax. the display is easy to read. it has an auto range feature. readings are not very accurate.
4.1.4The valence shell of an atom is the first shell (K\ third shell (M\ outermost shell.
4.1.5s an element that allows current to flow because it has no free electrons. is an
4.1.6The colour cod blue black black silver. blue brown black silver. blue black gold gold. blue black gold silver.
4.1.7farads ohms lumens
1.8the cross sectional area of its plates. the type of material it is made of
4.1.9Doping is the process of mixing intrinsic and extrinsic materials with one an
4.1.10Inductors are small transformers electronic compone nts that do not allow current to flow. also referred to as coils.
4.2Transistors are semiconductor devices that can be used as a switch or as an amplifier. Draw neat circuit di agrams to indicate:
4.2.1A transistor used as a switch (4\
4.2.2A transistor used as an amplifier (4\
4.2.3The circuit symbols for a NPN and PNP transistor (2\ [20] TOTAL: 10020