9.5 Determine the instantaneous power supplied by the source i the circuit in Fig. P9.5. 12/60°v( + 4 Ω j2 Ω -j2 Ω ww ΖΩ

?What is the period of the following sinusoidal voltage signal v(t) = 201 cos (318t + 71° )V .Write your answer in milli-seconds

Given a sinusoidal waveform: v, (t) = 50 cos (100t + 45°) V. Calculate the value of Us,when t=0.02 second. 49.94 V 34.10 V -46.86 V -40.4 V

An industrial plant has a real power demand of 650 kW at a power factor of 0.65 lagging. The power is supplied by a 3-phase line at voltage of 4.16 kV (line to line voltage). You were just hired and your first task is to find the size of capacitors (in μF) required to improve the power factor to 0.95 lagging. The capacitors will be connected in grounded Y. Find- a) Calculations of the apparent power and the reactive power before the connection of the capacitors, b) Calculations of the reactive power, reactance, and capacitance of a capacitor bank required to improve the power factor to 0.95 lagging c) Calculations of the apparent power and the reactive power after the connection of the capacitors. d) Drawing of the power triangle. In your sketch you must show the real, reactive, and apparent power before and after the power factor correction and highlight the reactive power supplied by the capacitor. e) Sketch of the capacitor connection. Note: frequency is 60 Hz.

?What is the period of the following sinusoidal voltage signal v(t) = 158 cos (304t + 16°) V .Write your answer in milli-seconds

Problem 52: Express the following in phasor form (in the rms sense) a. V2 (160) sin (wt + 30°) b. V2 (25 x 10-3) sin (157t – 40°) c. 100 sin (wt – 90°)