Н. W.: 1- Given the voltage v(t) = 120 cos (314t + /4) V, determine the frequency of the voltage in Hertz and the phase angle in degrees. %3D (Answer: 50 Hz; 45°) 2- Three branch currents in a network are known to be i(1) = 2 sin (377t + 45°) A iz(t) = 0.5 cos (377t + 10°) A i3(t) = - 0.25 sin (377t + 60°) A Determine the phase angles by which a) i(t) leads iz(t) b) i(t) leads i3(t). [Answer: a) i leads iz by -55°; b) i leads i3 by 165°]

Given Signals: v = 10 cos(wt + 70°)V vz = 6 cos (wt - 120°)V U3 = 12 sin(wt + 120°)v Which statement is correct? 1. vị leads v2 by 170° and leads v3 by 40° 2. vi lags vz by 170° and leads vz by 110° 3. v lags vy by 170° and leads vz by 40° 4. vi leads vz by 170° and lags vs by 110° 03 Write 1, 2, 3 or 4 04 Determine: Vr = Vì + V2 – V3 and write the final answer in polar form. Question 4 Vr = 10270° + 6- 120° – 12230° = 10.1332 – 169.77°V

Please answer in typing format

Find the period of repetition of the following sinusoidal waveforms and express them in phasor repre- sentation: vi(t) = 12 cos(314t + 10°) V v2(t) = 4 sin(2765t – 75°) V i1(t) = -0.2 sin(600rt – 100°) A i2(t) = -2.5 cos(377nt + 120°) A