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Question 6) a) What is the RMS value of an AC signal? In case of sinusoidal signals...

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Electrical Engineering

Question 6)

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

between RMS and maximum values? [5 marks]

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

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 oflines of magnetic flux

Question 5)

For the network shown in Figure Q5, the switch is closed on toposition 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 anddischarging inductor circuit

   (without so many resistors). [3 marks]

b. Determine the current in the inductor when t = 1.5 ms. [3marks]

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

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