question9
Question 9
9.1 A simplified diagram of an electrical machine is shown below. 9.1.1 Is this machine a DC motor or a DC generator? (1) 9.1.2 Write down the energy conversion that takes place while thismachine is in operation. (2) 9.1.3 Write down the name of component A in the diagram. (1) 9.1.4 In which direction will … Read more
Question 9
9.1 In the diagram, O is the centre of the circle. Points S, T and R lie on the circle. Chords ST, SR and TR are drawn in the circle. QS is a tangent to the circle at S. Use the diagram to prove the theorem which states that QST = R. (5) 9.2 Chord … Read more
Question 9
A closed rectangular box has to be constructed as follows: Dimensions: length (f), width (w) and height (h). The length (l) of the base has to be 3 times its width (w). The volume has to be 5 m3. The material for the top and the bottom parts costs R15 per square metre and the … Read more