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1. The SI unit for Impedance is?
2. Kelvin is the measurement of?
3. Which instrument would be used to measure Power?
4. The SI unit for Energy is the?
5. A 25 kilogram bag of cement falls to the ground from a height of 5 meters. How much force will the bag hit the ground with?
6. A wheel barrow is an example of a?
7. One set of gears are connected together. The smaller cog has 12 teeth
and the larger cog has 20 teeth. The smaller cog rotates 40 times
per second. How many times per second will the larger cog rotate?
8. An electric motor has an input of 4KW and an output of 3.3KW. The efficiency of the motor is?
9. What is the correct formula for calculating work done?
10. Which of the following statements is true?
11. Identify the material which could act as an insulator.
12. A 6mm2 copper conductor has a resistivity of 1.78×10-8 and is 87 meters long. What is the resistance of the conductor?
13. Which of the following materials would have the lowest resistivity?
14. Which of the following statements is correct?
15. Which formula predicts the effect of Voltage, Current and Resistance?
16. As current flows in a series circuit, the current will:
17. Three resistors of equal value are placed in series and are connected to a 12 Volt supply, 1.3 Amps flows through the resistors. What are the values of each of the resistors?
18. Four resistors with values of 12 Ohms, 7.5 Ohms, 9 Ohms and 4.8 Ohms are wired in parallel and connected to a 110 Volt supply. How much current will flow through the 7.5 Ohm resistor?
19. A circuit has a total resistance of 12 Ohms and 6.44 Amps flows through it. How much power will the circuit dissipate?
20. Calculate the volt drop of a circuit with a resistance of 1.2 Ohms with a current flow of 15 Amps.
21. Which of the following effect would happen to a circuit if the current flow in the circuit was to increase?
22. The effect that allows us to perform electroplating is:
23. The Tesla is the measurement for:
24. An alternator has a frequency of 60Hz. How long does it take to perform two full revolutions?
25. What is the generated EMF when a 5000mm long conductor cuts a magnetic field of 0.5 Teslas at a velocity of 0.42 m/s?
26. Which electronic device is designed to store an electrical charge?
27. What names are given to the two connections of a diode?
28. Which of the following electronic devices are suitable for detecting temperature change?
29. The resistivity of a material is defined as the resistance when measured across the opposite faces of a cube of that material, of volume:
30. What is the formulae for work done?
31. The following resistances are connected in parallel, 2 Ohm, 5 Ohm, 10 Ohm and 5 Ohm. What is the total resistance?
32. A voltage of 110V is passed through a resistance of 100 Ohm. What is the current drawn by the circuit?
33. H.R.C fuses can distinguish between:
34. What is the equation for electrical resistivity?
35. An A.C. generater has an output wave that is called:
36. Which of these will increase the strength of magnetic field for an iron-core electromagnet?
37. A 1.2 KW a.c. induction motor would normally be started with use of a:
38. A transformer has a turns ratio of 230:12 and has a primary voltage of 400V, what is the secondary volt?
39. If voltage were to remain constant in a circuit and resistance were to be increased, current would :-
40. What is the name of the insulating medium used in a MI cable?
