Two amplifiers having voltage gains 20 and 50 are connected as shown in the figure. If the initial input voltage is 25 mV, find the final output voltage obtained.

Two cells X and Y are connected to a resistance of 10Ω as shown in the figure.if the polarity of the cell Y is reversed, then the terminal voltage of the cell Y will be

Two cells X an Y are connected to a resistance of 10 Omega as shown in figure. The terminal voltage of cell Y is:

Two amplifiers are connected one after the other in series (cascaded).The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01 volt, calculate the tput ac signal.

Two cells of 1.25 V and 0.75 are connected in parallel. The effective voltage will be

A 50 Hz a.c. source of 20 V is connected across R and C as shown in figure. The voltage across R is 12 V. The voltage across C is

The variation with time t of the output E of an alternating voltage supply of frequency 50 Hz is shown in the figure. State the time t_1 , the peak value E_0 of the voltage, the root mean square voltage E_(rms) , the mean (Average) voltage E_(av)

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) if d.c. supply voltage is 10V?

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) if d.c. supply voltage is 5V?

The variation with time t of the output E of an alternating voltage supply of frequency 50 Hz is shown in the figure. The alternating supply is connected in series with a resistor of resistance 2.4 ohm. Calculate the mean power dissipated in the resistor.