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- Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?An AC circuit contains a 24 resistor, a 15.9-mH inductor, and a 13.3F capacitor connected in parallel. The circuit is connected to a 240-V, 400-Hz power supply. Find the following values. XL=XC=IR=AIL=AIC=AP=WVARsL=VARsC=IT=AVA=PF=%=2) a)For the following circuit find the total capacitance and inductance and hence find the total impedance of the circuit. V1 230V/50Hz E R1 350 C1 4700pF HE C2 10nF HH C3 47nF C4 220nF HH L1 72mH L2 32mH All Resistance in Ohms
- choose the right answer and show your solution 5. THREE CAPACITORS HAVING THE SAME CAPACITANCE (C = 200microFARAD) ARE CONNECTED IN SERIES WITH A 9 VOLTS BATTERY.FIND THE TOTAL CAPACITANCE. a.) 66.67microFARAD b.) NONE OF THE CHOICES c.) 76.67microFARAD d.) 15000 FARAD NOTE : DON'T ANSWER NO. 5 7. WHAT ARE THE VALUES OF VOLTAGES ACROSS EACH CAPACITORS? (IN ITEM NUMBER 5) * a.) 9 VOLTS V2 = 6 VOLTS V3 = 3 VOLTS b.) NONE OF THE CHOICE c.) V1 3 VOLTS V2 = 3 VOLTS V3 = 3 VOLT d.) 3 VOLTS V2 = 6 VOLTS V3 = 9 VOLTSA series resistance - capacitance ( R-C ) circuit is connected to a 230V, 60 - cycle source. If the power taken by the circuit is 4, 800W and the voltage drop across the resistor is 115V.Calculate the capacitance of the capacitor. 600.36 microfarad 1,500.05 microfarad 556.096 microfarad 250.94 microfarad6) When the frequency of an a.c. circuit containing resistance and capacitance is decreased, the current (a) decreases (b) increases (c) stays the same 7) In a series a.c. circuit the voltage across a pure inductance is 12 V and the voltage across a pure resistance is 5 V. The supply voltage is (a) 13 V (b) 17 V (c) 7 V (d) 2.4 V 8) The impedance of a coil, which has a resistance of X ohms and an inductance of Y henrys, connected across a supply of frequency K Hz, is (a) 2π Κ Υ (b) X + Y (c) √x² + y² (d) √X² + (2nKY)² 9) When a capacitor is connected to an a.c. supply the current (a) leads the voltage by 180° (c) leads the voltage by 1/2 rad (b) is in phase with the voltage (d) lags the voltage by 90° 10) In an R-L-C series a.c. circuit a current of 5 A flows when the supply voltage is 100 V. The phase angle between current and voltage is 60° lagging. Which of the following statements is false? (a) The circuit is effectively inductive (c) The equivalent circuit reactance is 25 2 (b)…
- 6) When the frequency of an a.c. circuit containing resistance and capacitance is decreased, the current (a) decreases (b) increases (c) stays the same 7) In a series a.c. circuit the voltage across a pure inductance is 12 V and the voltage across a pure resistance is 5 V. The supply voltage is (a) 13 V (b) 17 V (c) 7 V (d) 2.4 V 8) The impedance of a coil, which has a resistance of X ohms and an inductance of Y henrys, connected across a supply of frequency K Hz, is (a) 2π Κ Υ (b) X + Y (c) √x² + y² (d) X² + (2nKY)²Please answer this NEATLY, COMPLETELY, and CORRECTLY for an UPVOTE. For the following pairs of voltage and current, indicate their phase relationship (e.g. v leads i by 10°). Analyze whether the element involved in each pair is a resistor, inductor, capacitor or a combination. Also obtain the value of R, L, and C if sufficient data are given.R.) Two coils of inductances 4 H and 6 H are connected in parallel. If their mutual inductance is 3 H. Calculate the equivalent inductance of the combination if mutual inductance assists and if mutual inductance opposes the self-inductance respectively. a. 2.4 H & 1.4 H b. 3.75 H & 0.94 H c. 6.25 H & 2.75 H d. 16 H & 4 H
- A coil of resistance 152 and an inductance 1H and a capacitance 15µF are connected in series across 70 N supply. The current drawn is 5A. Find the frequency of power supply. (i) A capacitor and resistor are connected in series to an ac supply of 150 V and 60Hz. The current is 5A and the power dissipated in the circuit is 70W. Calculate resistance and capacitance value. Also, draw the phasor dogram Vivo V15Pro AFTHple CameraTHREE CAPACITORS HAVING THE SAME CAPACITANCE (C = 200microFARAD) ARE CONNECTED IN SERIES WITH A 9 VOLTS BATTERY. FIND THE TOTAL CAPITANCE. a.) 66.67microFARAD b.) NONE OF THE CHOICES c.) 76.67microFARAD d.) 15000 FARAD NOTE : DON'T ANSWER NO. 5 6. WHAT IS THE TOTAL CHARGE? (IN ITEM NUMBER 5) a.) 0.0006 C b) 0.00006 C c.) 6 C d.) NONE OF THE CHOICES1. A 650mH inductor is in series with a 1200 resistor. This is connected to V1 with V1 = 12V20° at 80Hz. Determine the voltage across the resistor VR(t) and across the inductor v (t) as a function of time. A) Plot all three potentials as a function of time on the same plot. Vin + V1 L1 650m SINE(O 1 f) Vout R1 120