21. A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
22. Find the Thevenin equivalent circuit parameter for the given network.
23. A 100 V, 50 Hz a.c. supply is applied across a series RLC circuit having R = 10 Ω, L = 100 mH and C = 1000 µF The current through the circuit will be
24. Which one of the following is correct?
25. A step voltage of 10 V applied to the circuit at t = 0. The current through the resistor R just after t = 0 and at steady state are:
26. A coil with a certain number of turns has a specified time constant. If the number of turns is doubled, the time constant will be
27. Use branch currents in the network shown in below figure to find the current supplied by the 60 V source.
28. For a series resonant circuit, at the half power points, which of the following is true?
29. In 0.025 W, there are
30. The reactance of capacitors increases as:
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