
Very clear explanation therotically and mathematically using trignometric formulaes.
Very clear explanation therotically and mathematically using trignometric formulaes. The voltage v across a load and...
Using rms values to represent their magnitudes, the voltage across and the current into a load are as follows in phasor form: v - Ve/o° and I -le-i Show that the instantaneous power p() v)i(t) can be written as pt) PP cos 2Q sin 2ut, where average power cos φ and reactive power Q-VI sin φ if I'= 120 V, 1-| A, and Φ = 30°, find the actual value of P. Q. S and power factor (PF). Is this...
20. The voltage and current in an electrical load is given by v(t) = 100 cos(wt + 15°) and i(t) = 2 cos(wt – 15°). The reactive power Q in the load is 21. An electrical load absorbs an average power of 8kW at a leading power factor of 0.8. The reactive power in the load is 22. A balanced Y-connected load with an impedance of 104–30°N? per phase is supplied by a balanced A-connected source with Va = 208/30°V...
Example 1 The voltage across the load is v(t) = 60 cos(wt - 10°) V and the current through the element in the direction of I voltage drop is i(t) = 1.5 sin(wt + 50°) A. Find a) The complex and apparent powers b) The real and the reactive powers c) The power factor and the load impedance.
The phasor voltage across a certain load is V = 1000√ 2∠ 30∘ V, and the phasor current I = 15 √ 2∠ 70 ∘ A. Determine the power factor. Determine the power. Determine the reactive power. Determine the apparent power delivered to the load. Determine the impedance. Is the power factor leading or lagging?
Question 1 (1 point) The voltage across a single phase load is v(t)=215 cos(315t). The load is consuming 1150+j1030 power. Find the value of a capacitor such that if it was connected in parallel across the load and voltage source, the resulting power factor at the voltage source would be 0.93 lagging.
P.3 The voltage across the terminals of a circuit is: v(t) = 30+ 20 cos(1207t +45°)+10 cos(120nt - 459) V and the current entering the terminal is: i(t) = 6+4 cos(120wt +10°) - 2 cos(120ft -60°) A a) Calculate the RMS value of the voltage b) Calculate the RMS value of the current c) Calculate the average value of the power absorbed by the circuit
3. If the voltage and current (both are rms values) supplied to a circuit or load by a source are Varm) = 460?0° V, Is(m)-1414L-45° A. Determine the a) the power supplied by the source which is dissipated as heat or energy in the circuit, b) the power stored in the reactive components and c) the power factor angle and power factor 4. An ideal transformer is rated to deliver 460 KVA at 380 V to a customer T Customer's...
0 40 V The no-load voltage across R2 in the voltage-divider circuit shown is shown is vo.no_load 8 V The smallest load resistor that is ever connected to the divider is RL,smallest 3.6 k Ω (kilo Ohm) When the voltage divider is loaded by RLsmallest, VO is not to drop below 7.5 V A) Assume the power ratings of commercially available resistors are 1/16, 1/8, 1/4, 1, and 2 W What power rating would you specify? PR1,rating Watt PR2.rating =...
please answer all questions and show all steps
5) The voltage source V, below has a frequency of 60Hz. The load is operating at 10kVA with 0.8pf leading. The angle of the voltage across the load is 0 degrees. Assume all values are RMS. Is 0.12 500uH - 120V V eterm: Please determine the following a) The phasor Is b) The power loss in the transmission line. c) The phasor Vs d) The component (inductor or capacitor) that must be...
Do the following problems 1) The voltage across a given circuit element is Vab-20 V. A positive charge of 2 C moves through the circuit element from terminal b to terminal a. How much energy is transferred? Is the energy supplied by the circuit element or absorbed by it? 2) Find the power by each element in the circuit of Fig. I 12 V 5A 8 V 20V 0.25, 2A 8A Figure 1 3) Assume that you are measuring the...