Question

An electronic oscillator is:
${\text{A}}{\text{.}}$ just like an alternator
${\text{B}}{\text{.}}$ an amplifier with feedback
${\text{C}}{\text{. }}$nothing but an amplifier
${\text{D}}{\text{. }}$a.c to d.c energy convertor

Answer 1

Hint: Recall the definition of an electronic oscillator, generating electronic waves and acting as an amplifier. Check all the options. An electronic oscillator is an electronic circuit that produces a periodic, oscillating electronic signal, often a sine wave or a square wave. Oscillators convert direct current (DC) from a power supply to an alternating current (AC) signal.

Complete answer:
An electronic oscillator is an electronic circuit that generates periodic, oscillating electronic signals.
They produce repetitive waveforms, without the requirement of any external waveform.
Oscillators produce electrical oscillations (vibrations), such as sound waves, ultrasounds.
In electronics, an oscillator circuit converts D.C. into high frequency A.C.
Checking options-
Option A-
An oscillator does not show any property of an alternator.
An alternator is an electrical generator that converts mechanical energy to electrical energy in the form of alternating current.
But an oscillator is a part of a generator that produces repetitive waveforms.
So, this is false.

Option B-
An oscillator acts as an amplifier generating high frequency A.C. feedback is given to check the heat losses.
So, this is a correct option.

Option C-
It acts as an amplifier but not just an amplifier.
So, this too is false.

Option D-
It is a D.C. to A.C. converter and not vice-versa.
This is a false option.

So, the correct answer is “Option B”.

Note:
A sine wave is generally used as it is the most fundamental waveform and can be used to generate any other waveform. A sine or square wave is used in the oscillators.