EEA102 Quiz 1 PDF

Quiz 1 1. Give the magnitude of I, if R = 0.8Ohms and the magnitude of Vs is 13 V. (Round off to 2 decimal places) 6.55 2. A capacitance C is 3mF and an inductance L is 1mH. At what frequency will their reactances be equal? 577.4 rad/sec 3...

Quiz 1 1. Give the magnitude of I, if R = 0.8Ohms and the magnitude of Vs is 13 V. (Round off to 2 decimal places) 6.55 2. A capacitance C is 3mF and an inductance L is 1mH. At what frequency will their reactances be equal? 577.4 rad/sec 3. Compare 𝑖1 = −5 cos 𝜔𝑡 A with 𝑖2 = 3 sin(𝜔𝑡 − 95°). By what angle does 𝑖1 lead 𝑖2 ? 5 4. The impedance angle of a parallel RC circuit is ____. ◯ Positive ◯ Negative ◯ Zero 5. In a pure _____, voltage and current are in phase. ◯ Inductor ◯ Capacitor ◯ Resistor 6. A coil having a 240V source has a current of 10.5 A when the frequency is set to 60 Hz. When the frequency is changed to 39 Hz, the resulting current is now 14.7 A. Find the inductance, L, of the coil (in mH). 55.84 7. The imaginary component of admittance is _____. ◯ Susceptance ◯ Resistance ◯ Conductance ◯ Reactance 8. The reactance offered by a capacitor to alternating current of frequency 50 Hz is 47 ohms. If frequency is increased to 98 Hz, the reactance becomes _____ ohm. 23.98 9. Solve for the magnitude of 𝑉𝑜. Use 𝑋𝐶 = 4.1 ohms. 4.20 10. Solve for 𝑉𝑥 in the circuit shown. The magnitude of 𝑉𝑥 is ____ (Volts). 29.36 11. A series RLC has R = 2.7 Ohms, C is 3mF and L is 1mH. What is the circuit current (in Amperes), if the applied voltage is 5V at 577.4 rad/sec? 1.85 12. Three impedances, each of magnitude 15 Ohms, are connected wye. If converted to delta, what will be the magnitude of each impedance (in Ohms)? 45 13. What is the reactance (in Ohms) of a 0.19H inductor at 133rad/sec? 25.27 14. What is the susceptance (in Siemens) of a 0.044F capacitor at 575rad/sec? 25.30 15. A series RL circuit is connected to a 110-V ac source. If the voltage across the resistor is 18 V, the voltage across the inductor is _____V. 108.52