Q1. The voltage applied to an a.c. circuit at time t seconds is given by: v1= 120sin(100at + 1/4) V. Find: (a) the peak value, the periodic time and the frequency; (b) the instantaneous value of the voltage when t = 8ms; (c) the r.m.s value of the voltage. If a load is connected to the voltage source, and the current ij= 8sin(100nt - 1/4) A is measured. (d) Determine the value of the impedance and clarify what component it would be. (e) Draw the phasor diagram showing viand i1. Total: (25 marks)