1. The voltage across a 20 uF capacitor is vc www capacitor current ic. 5 = 100te V. Determine the
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- The circuit is connected to a 60-Hz line. The apparent power in the circuit is 29.985 VA, and the power factor is 62.5%. The resistor has a voltage drop of 14.993 V, the inductor has an inductive reactance of 60 , and the capacitor has a capacitive reactance of 45 . ETITZVA29.985PF62.5%ER14.993VIRRPELILXL60VARsLLECICXC45VARsCCAssume that the voltage drop across the resistor, ER, is 78 V; the voltage drop across the capacitor, EC, is 104 V; and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. Find the missing values. ET ER78V EC104V IT IR IC Z20 R XC VA P VARSC PF CInductive Circuits Fill in all the missing values. Refer to the following formulas: XL=2fLL=XL2ff=XL2L Inductance (H) Frequency (Hz) Inductive Reactance ( ) 1.2 60 0.085 213.628 1000 4712.389 0.65 600 3.6 678.584 25 411.459 0.5 60 0.85 6408.849 20 201.062 0.45 400 4.8 2412.743 1000 40.841
- Assume that the voltage drop across the resistor, ER, is 78 V, that the voltage drop across the inductor, EL, is 104 V, and the circuit has a total impedance, Z, of 20 . The frequency of the AC voltage is 60 Hz. ETITZ20VAPFER78VIRRPEL104VILXLVARsLLAssume that the current flow through the resistor, IR, is 15 A; the current flow through the inductor, IL is 36 A; and the circuit has an apparent power of 10,803 VA. The frequency of the AC voltage is 60 Hz. ET ER EL IT IR15A IL36A Z R XL VA10,803 P VARSL PF LCapacitive Circuits Fill in all the missing values. Refer to the formulas that follow. XC=12fCC=12fXCf=12CXc Capacitance XC Frequency 38 F 60 Hz 78.8 400 Hz 250 pF 4.5 k 234 F 10 kHZ 240 50 Hz 10 F 36.8 560 nF 2 MHz 15 k 60 Hz 75 nF 560 470 pF 200 kHz 6.8 k 400 Hz 34 F 450
- L:57) A coil having an inductance of 0.01 H and resistance of 5 ohm is connected in parallel with a capacitance of 100 microfarad. If the supply voltage is 220 V and its frequency is 60 Hz, calculate: The reactive power absorbed by the coil The reactive power generated by the capacitor The active power absorbed by the coil.A 15 mH inductor is in series with a parallel combination of 80 ohm resistor and 20 microFarad capacitor. If the angular frequency of the applied voltage is1000 rad/sec, find the inductive and capacitive reactance in ohms choices: a. 50, 15 b. 12, 50 c. 14, 49 d. 49, 14A 40μF capacitor in series with a coil of resistance 8Ω and inductance 80mH is connected to a 200V, 100Hz supply. Calculate: i. The circuit impedance. ii. The current flowing. iii. The phase angle between the voltage and current. iv. The voltage across the coil. v. The voltage across the capacitor.
- a) Compute the capacitance of a parallel-plate capacitor with plates 10 cm by 20 cm and separation of 5 mm if the dielectric are (i) an air dielectric, (ii) a ceramic dielectric with permittivity of 7500A voltage v = 210 sin (275t + π/2) is applied to a capacitor rated 86 μF. Find the r.m.s. value of currentA coil of 0.5 H inductance and 8 ohms resistance is connected in series with a capacitor across a 200 V, 50 Hz supply. If the current is in phase with the supply voltage, determine the capacitance of th the capacitor and the p.d. across its terminals. Answer: [20.26 µF, 3.928 k]