Two alternating voltages are given by v1 =120 sin (wt) volts and v2 =200 sin(wt −π/4) volts. Obtain sinusoidal expressions for v1 -v2 (a) by plotting waveforms, and (b) by resolution of phasors.

A capacitor "C", an inductor "L" and a switch "S" are connected in series. When the switch is open, the plate to the left of the capacitor has charge "Qo". The switch is closed the load and current vary sinusoidally with time. Represent graphically the load "Qo" and the intensity of current "I" as a function of time "t", and explain why the current leads the load by a phase difference of 90°.

The frequency of a sinusoidal voltage with a maximum value of 250V is 55 Hz.a) Write the equation for this voltage.b) Calculate the value of the voltage at 0.008 seconds from the beginning, while the curve increases in the positive direction from the moment t = 0?

A sinusoidal voltage has a peak value of 15 V, has a frequency of 125 Hz, and crosses zero with positive slope at t=1 ms. Write an expression for the voltage

Q5)-a)For this figure shown below the phase relationship between the sinusoidal waveform Of this set. -10sin(wt+80) V=15sin (wt+40) Q5)-b) for this circuit find the max energy if XL=100 Vm-300v,L=0.3H V= Vm Sinwt

a) Using your own words, describe how triangular waveforms are produced from sinusoidal waveforms. b) Write a sinusoidal formula that will produce a triangular wavefor y c) Demonstrate your understanding by plotting the formula shown in b using any of the plotting software.

A sinusoidal current of 5 Arms is flowing through a series combination of a resistor and Inductor. The value of R is 45 ohms and that of the inductance is 15 mH and a frequency of 60 Hz. Find the magnitude and the phase angle of the voltage across the combination. (Hint: you can use phasor diagram). Select one: a. [V]=28.89, angle=9.39 b. IV]=25.60, angle367.00 c. [V]=128.01, angle3D10.18 d. IVl=226.77, angle=D7.16

1. What is the shortest time required for a 4.3-krad/s​ sinusoid to increase  from  two-fifths to  four-fifths  of ​its peak value ?   CHOICES:  A. 120 s​ B. 140 s​ C. 160 s​ D. 180 s​ E. NOTA​   ​

A sinusoid V1 =V m1 cos (at + 35") leads another sinusoid v,=V m2 sin (at + $) by 120 degrees. What is P in degrees?

7 Find the average and effective values of voltage for sinusoidal waveform shown in Figure. Vm = 100 V 2x x14 9714 [Ans: 27.17 V, 47. 67 V]