Write the reason why do we preferred an a.c. voltage instead of d.c. voltage.

What are ac voltage ?

Write the equation for ac voltage.

With whom the relation between the phase of current and voltage in AC cirucit will be represented?

Write the common meaning of 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.

The amplifiers X, Y and Z are connected in series. If the voltage gains of X, Y and Z are 10, 20 and 30, respectively and the input signal is 1 mV peak value, then what is the output signal voltage (peak value) (i) if dc supply voltage is 10V? (ii) if dc supply voltage is 5V?

If E_0 represents the peak value of the voltage in an a.c. circuit, the rms value of the voltage will be ......

Which device is used to increase or decrease A.C. voltage ?

…….. does not change with time for D.C. current and D.C. voltage.