(c) Find the amplitude V the angular velocity w and the phase shift & for the sinusoidal voltage v(t) = V sin(wt + 8) where the voltage is OV at t = -8.13m sec after which it increases for a peak of 15V at t = 6.78m sec
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- 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 Given a capacitive load absorbing 5 kW with a power factor of 0.85. The source connected to this load is an AC voltage supply with 120V RMS at a frequency of 50 Hz. Please find; A) Peak current (m) and RMS Current (ms) Values B) Draw peak voltage and current phasors on phasor diagram with everything labelled C) Find the value of an inductor that when connected in parallel will improve the power factor to 0.95.An electrical circuit with a sinusoidal voltage source, a resistor, and a capacitor all connected in series. The voltage across the capacitor: Select one: a. Leads the current in the capacitor by exactly 90o b. Is in phase with the sinusoidal voltage source c. Is in phase with the voltage across the resistor d. Leads the current in the circuit by 90o e. Lags the current in the circuit by 90o
- An inductive coil of resistance 15 ohms and inductance 0.2 is commented in parallel with a 100 microfarad capacitor to a variable frequency supply.Find the frequency at which the total current taken is in phase with the supply voltage. What is the value of this current if the voltage is 200V.Draw a phasor diagram7 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]A sinusoidal 50 Hz voltage of 200 V (rms) supplies the following three circuits which are in parallel: (a) a coil of inductance 0.03 H and resistance of 3 ohms, (b) a capacitor of 400 microFarad in series witha resistance of 100 ohms and (c) a coil of inductance 0.02 H and resistance 7 ohms in series with a 300 microFarad capacitor. Find the total current supplied?
- What is the value of a sinusoidal voltage at 7 us (micro second) from the positive going zero crossing when Vp = 15V and f = 50KHZ ? %3D A sinusoidal voltage is applied to the circuit below. Determine the following: Ip, Irms, lavg, Ipp. 1.0 k2 OVFor the below sinusoidal voltage trace displayed by the CRO, the time/cm switch is on 0.2ms/cm and the volt/cm switch is on 1 V/cm. a) the frequency will be Hz b) the r.m.s value will be In CRO the beam can also be shifted vertically by applving a suitable DC voltage to theA 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
- 1. What effect does changing the frequency on the effective value of sinusoidal voltage? 2. What effect does changing the amplitude on the effective value of sinusoidal voltage?PHASE RELATIONSHIP SINUSOIDAL( NEED NEAT HANDWRITTEN SOLUTION ONLY OTHERWISE DOWNVOTE).C 7. A capacitor, a coil, and two resistors of equal resistance are arranged in an AC circuit as shown in the figure. An AC source provides an emf of AVrms = 20.0 V at a frequency of 60.0 Hz. When the double-throw switch S is open as shown in the figure, the rms current is 183 mA. When the switch is closed in position a, R rms S- the rms current is 298 mA. When the switch is closed in position b, the rms current is 137 mA. Determine the values b L of R, C, and L. ell