Q1

The potential difference across a circuit is given by the complex number

If V= 40 + j35,

and the current is given by the complex number

I = 6 + j3

a) Sketch appropriate phasors on an argand diagram,

b) Find the phase difference (angle Φ ) between the phasors for voltage V and current I

c) Find power (watt) = V × I × cos (Φ)

Q2

i = 15 sin (100Πt + 0.6)

What is the amplitude, period, frequency.

Whats the initial phase angle when t = 0 expressed in both radians and degrees.

The value of e when t = 2.5 sec the Time in miliseconds when the current first reaches its maximum value.