(d) The current across a capacitor lags the voltage by: i) 30° ii) 45° iii) 70° iv) 90° v) Not mentioned
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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, 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 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 C
- 3. A 10 µF capacitor will have less capacitive reactance than a 20 µF capacitor in a 60 Hz circuit. Select one: True FalseA 30 μF capacitor is connected in parallel with a coil of inductance 50 mH and unknown resistance R across a 120 V, 50 Hz supply. If the circuit has an overall power factor of 1, find the value of R.A 200µF capacitor is connected in series to a 250V, 60Hz source. Assuming its resistance is 20Ω, calculate its impedance. a. 24ohmsb. 3ohmsc. 13ohmsd. 22ohms
- A capacitor has a plate area of 0.01 square meters. A second capacitor has a plate area of 0.02square meters. If the first capacitor is 0.1 μF, what is the value of the second capacitor if allother physical characteristics are identical?3) ____A) 0.1 μF B) 0.05 μF C) 0.4 μF D) 0.2 μFThe voltage across a capacitor C is equal to v(t) = 8 cos(1000t) V. Determine the current i(t) through the capacitor at time t. C=100mu,F and t=8An air filled parallel plate capacitor has a capacitance of 100 pF and a plate separation distance of 0.5 mm. The gap is filled with a dielectric of relative permittivity = 12 and dielectric strength of 300 kVm-1. What is the maximum energy this capacitor can store? Note: ε0=8.85x10-12 Fm-1
- The inner and outer radii of a spherical capacitor are 3 cm and 9 cm, respectively. If the dielectric used has a relative permittivity 7.58, determine the capacitance in picofarads.A 160 μF capacitor is connected in series with a 10 Ω resistor. Write the equation of the current when the voltage is 220 Vp? a. 11.4 sin (377t + 59) b. 8.9 sin (377t – 46) c. 9.8 sin (377t + 52) d. 7.2 sin (377t + 46)Determine the equivalent capacitance for the given circuit, where C = 8 F