Which one of the following amplifiers is designed to operate digital signals?

Refer to the given image: The circuit shown in the image has a zener regulated D.C power supply. Assuming that the zener diode is ideal, the minimum value of RL due to which the output voltage would remain constant will be ________.

What would be the input impedance of an ideal op-amp?

The application where one is most likely to find a quartz oscillator would be _____.

The output impedance of an operational amplifier is _____.

To generate 1KHz frequency of oscillations, the most suitable circuit is _____.

To generate 1KHz frequency of oscillations, the most suitable circuit is _____.

The output impedance of an operational amplifier is _____.

The application where one is most likely to find a quartz oscillator would be _____.

What would be the input impedance of an ideal op-amp?

Refer to the given image: The circuit shown in the image has a zener regulated D.C power supply. Assuming that the zener diode is ideal, the minimum value of RL due to which the output voltage would remain constant will be ________.