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Assertion : In an oscillator, the feedba...

Assertion : In an oscillator, the feedback is in the same phase which is called as positive feedback.
Reason: If the feedback voltage is in opposite phase, the gain is greater than one.

A

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true not but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false

D

If both assertion and reason are false.

Text Solution

AI Generated Solution

The correct Answer is:
To analyze the given assertion and reason, let's break it down step by step. ### Step 1: Understand the Assertion The assertion states: "In an oscillator, the feedback is in the same phase which is called as positive feedback." - **Explanation**: In an oscillator circuit, the feedback signal is fed back to the input in such a way that it reinforces the input signal. This is known as positive feedback. It is essential for the oscillation to occur because it ensures that the output continues to amplify the input signal. ### Step 2: Understand the Reason The reason states: "If the feedback voltage is in opposite phase, the gain is greater than one." - **Explanation**: This statement is incorrect. If the feedback voltage is in the opposite phase (negative feedback), it actually reduces the overall gain of the system. Negative feedback tends to stabilize the output and can lead to a gain that is less than one, which is not suitable for oscillation. Instead, it would operate as a regular amplifier with reduced gain. ### Step 3: Conclusion - The assertion is true because positive feedback is indeed used in oscillators. - The reason is false because negative feedback results in a gain that is less than one, not greater. ### Final Answer - Assertion: True - Reason: False
To analyze the given assertion and reason, let's break it down step by step. ### Step 1: Understand the Assertion The assertion states: "In an oscillator, the feedback is in the same phase which is called as positive feedback." - **Explanation**: In an oscillator circuit, the feedback signal is fed back to the input in such a way that it reinforces the input signal. This is known as positive feedback. It is essential for the oscillation to occur because it ensures that the output continues to amplify the input signal. ### Step 2: Understand the Reason ...
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