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Q1— Section header —
1.1Convert 130 mm to m (2\
1.2Indicate whether the following statements are TRUE or FALSE by writing only 'True' or 'False' next to the question number (1.2.1
1.2.5\in the ANSWER BOOK.
1.2.1Power is measured in ohms.
1.2.2The prefix stands for micro
1.2.3Velocity is the rate of change in position of an object.
1.2.4Speed is measured in m.s
1.2.5To convert km to m, divide by 1000 (5 1\ (5\
1.3A bus travels 10 km in 30 min. Calculate the average speed of the bus. (2\
1.4Define power (1\ [10]10
Q2— Section header —
2.1Choose a term from COLUMN B that matches a description in COLUMN A. Write only the letter (A E\next to the question number (2.1.1
2.1.5\in the ANSWER BOOK. COLUMN A COLUMN B
2.1.5The central part of an atom. Electrons orbiting in the outermost shell Materials that prevent the flow of current. The voltage measured across a battery on
2.2current flowing through the bulb is 2 A and the emf of the cell is 1,8 V. Determine the potential difference of the circuit. (3\
2.3Define the following terms regarding magnetism.
2.3.1agnetic flux
2.3.2Magnetic flux density (2 x
2.4Complete the following sentences by writing only the missing word or words next to the question number (2.4.1
2.4.2\n the ANSWER BOOK.
2.4.1When resistors are connected in series the voltage across each resistor while the current is
2.4.2When the resistors are connected in parallel the voltage across each resistor while the current is in the circuit (4\
2.5How is three phase supply system generated
Q3— Section header —
3.1What happens to the flow of current once a circuit is open circuited (1
3.2TWO cells each with an emf of 2,2 V and internal resistance of 0,5 are
3.2.1Draw a circuit diagram (4
3.2.2The total resistance of the circuit (4\
3.2.3The total current (2\
3.2.4The volt drop across the resistor (2\
3.3battery.
3.3.1The total resistance
3.3.2The current flow
3.3.3(6\ (12041002\ Copyright reserved Please turn over
3.4State ONE advantages of load balancing in a three phase system. (1
3.5Briefly explain how a single phase transformer operates on no load.
Q4— Section header —
4.1Give THREE reasons why earthing is important. (3\
4.2Name THREE devices of an analogue measuring instrument. (3\
4.3Briefly explain the operation of an attraction type moving iron instrument. (3\
4.4Explain how you would connect the following measuring instruments in electrical circuits.
4.4.1Voltmeter
4.4.2Ohmmeter
4.4.3Ammeter
4.4.4Frequency meter (4 1\ (4\
4.5State TWO precautions to be observed when using an insulation resistance tester. (2\ [15]15
Q5— Section header —
5.1Draw the electrical wiring symbols for the following:
5.1.1Transformer
5.1.2Motor
5.1.3Lamp
5.1.4Circuit breaker
5.1.5Fuse (5 1\ (5\
5.2Draw a circuit diagram to show how two luminaires are controlled by a single switch. (6\ (12041002\ Copyright reserved
5.3State the circuit breaker sizes used to protect the following sub circuits:
5.3.1Stove
5.3.2Lights
5.3.3Socket outlets
5.3.4Geyser (4 1\ (4\ [15]15
Q6— Section header —
6.1Name THREE properties of steel (3\
6.2Explain the use of the following insulators
6.2.1Pin type insulator
6.2.2
6.3Name FIVE electrical components that are found in an electrical distribution board (5\ [10] TOTAL: 100 (12041002\10