1P AC Circuits

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?

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

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

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.

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?

A series connected circuit has R = 4 Ω and L = 25 mH. Calculate the value of C that will produce a quality factor of 50.

An inductive coil consumes active power of 500W and draws 10A from a 60Hz ac supply of 110V. What is the coil inductance?

A sine wave has a frequency of 60 Hz. Its angular frequency is

A voltage of 10 V is applied to a series RLC circuit. If the Q of the coil at the resonant frequency is 20, the voltage across the inductor at the resonant frequency will be

In a laboratory experiment, the impedance of a coil was obtained at 60 Hz and 30 Hz. These are 75.48 ohms and 57.44 ohms, respectively. What is the inductance of the coil?

A half wave rectified sine wave has an average value of 100 amperes. What is its effective value?