What are ac voltage ?

An applied voltage signal consists of a superposition of a dc voltage and an ac voltage of high frequency. The circuit consists of an inductor and a capacitor in series. Show that the dc signal will appear across C and the ac signal across L.

Write the equation for ac voltage.

When an AC voltage of 220 V is applied to the capacitor C

A step up transformer has transformation ratio of 3: 2. What is the voltage in secondary if voltage in primary coil is 30 V ?

A resistor of 100 Omega and a capacitor of 250 muF are connected in series to a 220 V , 50 Hz ac source. Calculate the voltage (rms) across the resistor and the capacitor . Is the algebraic sum of these voltages more than the source voltage ? If yes, resolve the paradox.

A 12 Omega resistor and a 0.21 henry inductor are connected in series to an A.C. source operating at 20 volt, 50 cycle/second. What is the phase angle between the current and the source voltage ?

The frequency of an alternating voltage is 50 cycles/s and its amplitude is 120 V. Then what is the rms value of voltage ?

(a) The peak voltage of an ac supply is 300 V. What is the rms voltage? (b) The rms value of current in an ac circuit is 10 A. What is the peak current?

(a) The peak voltage of an ac supply is 300V. What is the rms voltage ? The rms value of current in an circuit is 10V. What is the peak current ?