and power factor it draws. 2 A coil having a resistance of 502 and an inductance of 0.025 His connected in series with another resistance of V, 40 hz mains. 702 and capacitance of 500 uF. The circuit is supplied by E=-450 cos (500t-650) supply. Determine the total power and pf factor drawn from the supply and equation of the resulting current? 3. An emf represented by e- 150 cc (100

Delmar's Standard Textbook Of Electricity
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ISBN:9781337900348
Author:Stephen L. Herman
Publisher:Stephen L. Herman
Chapter26: Three-phase Circuits
Section: Chapter Questions
Problem 3PA: You are an electrician working in an industrial plant. A 30-hp three-phase induction motor has a...
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No2
reliminary Examination
Directions Solve the following problems completely. Enclose your final answer in a BOX.
1. An inductive circuit takes a current of 10A at 0.78 pf when connected to a source e = - 440 sin (500t - 75°)
supply if the circuit is now connected in series with capacitor of 120 uF supplied by a 350 V, 40 hz mains.
Calculate the current, power and power factor it draws.
2 A coil having a resistance of 502 and an inductance of 0.025 His connected in series with another resistance of
70 and capacitance of 500 uF. The circuit is supplied by E=-450 cos (5001-650) supply. Determine the total
power and pf factor drawn from the supply and equation of the resulting current?
3. An emf represented by e--150 cos (100nt +370) is impressed across a circuit consisting of a 5 2 resistor and
200 uF capacitor and 0.015 H inductor. Determine the expression for the current. Find the power supplied and
power factor of the circuit
4. A coll is connected in series with a capacitor across a 550 V, 50 hz supply. If the voltage across the coil and the
capacitor are numerically equal, what will be the value of these voltages if the power factor of the circuit is 0.85
5.
A capacitive drcuit takes 1050 VARS at a pf of 0.85 from a 200 V, 50 hz source, what will be the value of additional
inductance to be inserted in series with the circuit if the overall is to be 0.96 lag?
6.
A circuit takes a current of 10 A inductive and draws 0.76 reactive factor when connected to a 250 Y 50 HT
supply. In other grout taken an ont of 101
Transcribed Image Text:reliminary Examination Directions Solve the following problems completely. Enclose your final answer in a BOX. 1. An inductive circuit takes a current of 10A at 0.78 pf when connected to a source e = - 440 sin (500t - 75°) supply if the circuit is now connected in series with capacitor of 120 uF supplied by a 350 V, 40 hz mains. Calculate the current, power and power factor it draws. 2 A coil having a resistance of 502 and an inductance of 0.025 His connected in series with another resistance of 70 and capacitance of 500 uF. The circuit is supplied by E=-450 cos (5001-650) supply. Determine the total power and pf factor drawn from the supply and equation of the resulting current? 3. An emf represented by e--150 cos (100nt +370) is impressed across a circuit consisting of a 5 2 resistor and 200 uF capacitor and 0.015 H inductor. Determine the expression for the current. Find the power supplied and power factor of the circuit 4. A coll is connected in series with a capacitor across a 550 V, 50 hz supply. If the voltage across the coil and the capacitor are numerically equal, what will be the value of these voltages if the power factor of the circuit is 0.85 5. A capacitive drcuit takes 1050 VARS at a pf of 0.85 from a 200 V, 50 hz source, what will be the value of additional inductance to be inserted in series with the circuit if the overall is to be 0.96 lag? 6. A circuit takes a current of 10 A inductive and draws 0.76 reactive factor when connected to a 250 Y 50 HT supply. In other grout taken an ont of 101
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