A single-phase motor draws 220 W at a power factor of 0.8 lagging when connected across a 240 V rms, 60-Hz source. A capacitor is connected in parallel with the load to produce a unity power factor. Determine the required capacitance.

How do the capacitor and inductor support the circuit in power factor improvement?

What is reactive power, and how does it affect the efficiency and stability of an electrical grid?

A single-phase motor takes 10A at a power factor of 0.7 lagging when connected to a 230V, 50 Hz supply. A capacitor bank is connected in parallel with the motor to raise the power factor to unity.i) Draw the phasor diagram before and after power factor correction with the supply voltage taken as the reference phasor. ii) Calculate the percentage change in the supply current after power factor correction.iii) Calculate the value of capacitance required.

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Draw the per-phase equivalent circuit of a three-phase squirrel-cage induction machine. List all of the elements in the equivalent circuit and briefly state their function

1. Impedance is the total opposition to an AC circuit caused by electric penalty tions, the tra capa multiple pacitive systema 62 Fundamentals of AC Electricity Questions for This C a. 1. Draw a diagram of an AC sine wave and identify its peak voltage and peak-to-peak voltage levels. b. 2. Explain the term frequency as it refers to AC electricity. c. 3. Discuss the difference between a load center and a fused disconnect. 2. WE wa 4. Explain how you would test for voltage in a fusible dis- connect on the line-side and load-side terminals. vi ci 5. Trace the path of a generated AC voltage from the generat- ing station where it is produced to the point where you would connect it to a machine in a factory. Be sure to iden- tify all the important parts of the system between the gen- eration station and the disconnect on the machine. a. be 3. True or False inductive reactance, capacitive reactance, and resistan 2. The units of impedance are

Question -9b

Q9. What is the basic principle that a cage winding can be represented by a three-phase winding? Give your explanation.

1-Adiust the function generator to give (10 v p.p )(170) Hz.