Oscillator Feedback – Rankers Physics

Logic Gates: Practice Problem & Solution

Assertion (A): In an oscillator, the feedback is in the same phase which is called as positive feedback. Reason (R): If the feedback voltage is in opposite phase the gain is greater than one.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Logic Gates. Understanding the underlying formula is key to arriving at the correct answer below:

Assertion (A) is true; for sustained oscillations, positive feedback (in-phase) is required. Reason (R) is false; opposite phase feedback, known as negative feedback, typically reduces the amplifier's gain, not increases it.

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