When the negative feedback is applied to...

When the negative feedback is applied to an amplifier of gain 50, the gain after feedback falls to 25. Calculate the feedback ratio. Data : `A = 50, A_f = 25 `

Verified by Experts

Voltage gain after feedback,
`A_f = (A)/(1 + A beta )`
` 25 = ( 50 )/( 1 +50 beta)`
hence the feedback ratio ` beta ` = 0.02`

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