Correct Answer - Option 3 : It is also used as switch debouncing.
correct option is 3
Concept
oscillators
An oscillator is a circuit that produces a continuous, repeated, alternating waveform without any input.
An oscillator is an amplifier with +ive feedback.
The source of oscillation in an oscillator is the DC switching transient noise.
switch debouncing → Switch debouncing in an electronic design ensures that the device that is sampling the switching waveform does not misinterpret a single button press as many.
an oscillator is not used as a switch debouncing. (option 3 is incorrect statement)uses of the oscillators
used in alarms and buzzes. (option 1 is a correct statement)
used to generate clock pulses for microprocessors and micro-controllers. (option 2 is the correct statement)
used in computers, metal detectors, stun guns, inverters, ultrasonic and radio frequency applications. (option 4 is the correct statement)
Quartz watches(which uses crystal oscillator)
used in various audio systems and video systems.
Used to operate decorative lights
