Find the phase relations for the following pairs of sinusoids. Sketch the curve e and i and determine which one LAGS and LEADS. a. v = 60 sin(377 t + 50°) V ; i = 3 sin(754t − 10°)A b. v = 6.4 sin(7.1 πt + 30°) V ; i = 7.3 sin(7.1 πt − 10°)A c. v = 42.3 sin(400 t + 60°) V ; i = −4.1 sin(400t − 50°)A

A - Explain the symbols, operating principles and usage areas of the diodes given below. (Zener diode: photo diode: led diode: opto coupler) B- Draw the voltage trigger circuit and explain its operation. Explain how there is a difference between the voltage quadrant and the tripler

Find the sinusoidal and the rms phaser expression Vs = 120 sin (377t+0 degrees)

Problem # 5 Consider the sinusoidal voltage and current shown below: v(t) = 170 cos(120zt - 60°) V and i(t) = 60 sin(120xt - 30°) A. Plot v(t) and i(t) and determine if the current is leading or lagging the voltage. Find the Phasor representations of both voltage and current. Determine the rms values of both voltage and current. Determine the apparent power, S, P, Q, pf, and r.f. a) b) c) d)