15.i. Consider a coil whose resistance, 40 and inductance, 13.5mH is connected across 210V, 60HZ AC supply. The inductive reactance is calculated as a. 4.24H b. 4.242 c. 5.080 d. 5.08H
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- The total impedance Z, of a circuit containung an inductor with inductance L and resistance R in series is given by Z R j2fL where f frequency . If Z (50 j200)ohm and f = 50Hz. Find R and LCalculate the velocity factor of a coaxial cable used as a transmission line with the characteristic impedance of 50 ohms; capacitance is 40 pF/m and an inductance equal to 50 microH/m.A parallel connection of a resistor, inductor and capacitor is presented in the figure below. The applied voltage is: u(t)=15square root of 2sin(wt+45deg ),V . The impedances of the elements are: R = 13 Ω, ωL = 41 Ω, 1 /wC= 18 OHMS . Find the currents through the elements, the apparent power S, the active power P and the reactive power Q.
- The resistance and inductance of a coil can be obtained by connecting the coil in series with a known resistance R and measuring the coil voltage Vcoil, the resistor voltage Vr and the total voltage V. The frequency must also be known, but the phase angles of the voltages are not known. Given that f = 60 Hz, R = 10 ohms, Vcoil = 22.4 V, Vr = 20 V and V = 36V. Calculate Xl and XcA series circuit of RLC with following parameters, R=15 ohm, L=20 m H & C=100 micro Farad. VT=169.7 sin (337t-30) Volt. Find the following: Zt, , It, Voltage across each element, Power factor, apparent power, real or average power and reactive power and the total phasor diagram and power phasor diagramObtain the overall impedance for the following cases a. P = 1500 W, Q = 2000 VAR (inductive), ???? = 12 ? b. ? = 4500∠60° ??,? = 120∠45° ?
- A coil of inductance 318.3 mH and negligible resistance is connected in series with a 200 ohm resistor to a 240V, 50 Hz supply. Calculate the inductive reactance of the coil, the impedance of the circuit, the current in the circuit, the p.d. across each component, and the circuit phase angle.A resistor'R' with resistance value of 24 ohm, an inductor 'L' with inductance 20mH, and a capacitor 'C' with capacitance 50 micro Farrad are connected in series with a AC voltage v(t) where v(t) = 50 cos (2 vt + 30 degrees) v. Determine the current i(t) and total impedance if the frequency f is i. 60 Hz ii. 400HzA 200-Ω resistor is connected in series with a 1.32-uF capacitor. The voltage across the resistor is vR = (1.20 V) cos (3415.59 rad/s)t. Determine the capacitive reactance of the capacitor.
- Two coupled coils have inductance of L1 = 0.8 H and L2 = 0.2 H, respectively. If the coefficient of coupling is 0.75, find the turns ratio N1/N2 for the coils. Show Solution PleaseA resistor of 6 ohms and an unknown impedance coil in series draws 12 A from a 120 V, 60 Hz line. If the real power taken from the line is 1152 Watts, what is the coil inductance?A coil of inductance 318.3 mH and neg[1]ligible resistance is connected in series with a 200 resistor to a 240V, 50 Hz supply. Calculate (a) the inductive reactance of the coil, (b) the impedance of the circuit, (c) the current in the circuit, (d) the p.d. across each component, and (e) the circuit phase angle