Question

Question 6)

a) What is the RMS value of an AC signal? In case of sinusoidal signals which relationship exists

between RMS and maximum values? [5 marks]

b) Why AC quantities cannot be added arithmetically as in DC? [5 marks]

Question 7)

Given the following A.C. voltage, v(t) = 80 sin (942t – π/6), state:

(a) angular frequency [3 marks]

(b) Period [3 marks]

(c) phase difference [4 marks]

Question 2)

Using diagrams, state at least three (3) characteristics of lines of magnetic flux

Question 5)

For the network shown in Figure Q5, the switch is closed on to position 1 when t = 0 and then moved to position 2 when t = 1.5 ms.[10 marks]

a. Simplify the circuit to simple (conventional) charging and discharging inductor circuit    (without so many resistors). [3 marks] b. Determine the current in the inductor when t = 1.5 ms. [3 marks]

c. Determine the current in the inductor when t = 2.5 ms. [4 marks

Answer 1

remaining questions post in next window along with figure Q5