1P AC Circuits

For which of the following waveforms are the rms value and the mean value the same?

A resistance of 30 ohms and a capacitance of 132.6 μF are connected in series across a 220 V variable frequency ac supply. At what frequency in Hz will the current be 4.4 A?

A 40 ohm resistor and a pure capacitor are connected in parallel across a 230 V, 60 Hz ac supply. The total current taken from the supply is 8 A. Find the capacitance of the capacitor in μF.

A series RLC circuit consists of 20 ohms resistance, 0.2 H inductance and an unknown capacitance. Find the capacitance if the circuit has a leading angle of 45° at 60 Hz.

A circuit which has \(\omega_0 = 10^{6}\) rad/s, C = 10 pF and Q = 100 must have a resistance of ____ kΩ.

A coil of 50 Ω resistance and 150 mH inductance is connected in parallel with a 50 μF capacitor. The source voltage is \(100\sin(\omega t + 30^\circ)\) V at 60 Hz. What is the equation of the line current?

A series RLC circuit has R = 10 ohms, \(L = 40 \times 10^{-6}\) H and \(C = 60 \times 10^{-12}\) F. What is the resonant frequency of the circuit in MHz?

What is considered as the most important value of a sine wave?

A circuit has a resistance of 20 ohms and reactance of 30 ohms. What is the p.f of the circuit ?

A capacitive load always has a __________ power factor

The rms value of a sinusoidal wave is equal to _________ of maximum value.

A series RLC circuit has R = 100 ohms, L = 100μH and C = 100 pF. What is the frequency in MHZ at unity power factor?

The ratio of active power to apparent power is known as _______________ factor.

At ________________ frequencies, the parallel R-L circuit behaves as purely resistive.

In a circuit containing R, L, and C, power loss can take place in

A resistance of 40 ohms and inductance of 79.6 mH are connected in parallel across a 240 v, 60 Hz ac supply. Find the total current in amperes.

The form factor is the ratio of

If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is

A voltage of \(e = 70.7\sin 50t\) V is applied to a series circuit containing a resistance of 4 ohms and an inductance of 60 mH. What is the impedance of the circuit in ohms?

A series RL circuit has R = 6 Ω and \(X_L = 8\) Ω. What is the magnitude of the circuit admittance?