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Q. When the negative feedback is practical to an amplifier of gain 50 the gain falls to 25. Compute the feedback ratio?
Af = A / 1 + Aβ
25 = 50 / 1 + 50 β
1 = 2 / 1 + 50 β
1 + 50 β = 2 (i.e) 50 β = 1
β = 1 /50 = 0.02
A 30-g car rolls from a hill 12 cm high and is traveling at 154 cm/s as it travels along a 275 cm horizontal track. What is the momentum of the car?
two charge(q) each are kept 1m apart, where should third charge be placed in order to get third charge -q/4
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