E = IR
I = E/R
R = E/I
W=I^2*R
W=IE
W=E^2/R
R = R1+R2 in series circuit
1/R = 1/R1 + 1/R2 in parallel circuit
total current = I1 + I2 in parallet circuit
current is the same in series circuit
total voltage = V1 + V2 in a series circuit
voltage is the same in a parallel circuit...
Answers:
A. Vout = 0.6 + 12 = 12.6 volts
I peak = (30 - 12.6)/ 2.2K = 7.9 ma
B. V out = 12 - 0.6 = 11.4 volts
i peak = (30 - 11.4)/2.2k = 8.45 ma
C. V out = -12 +0.6 = -11.4 v.
I peak = (30 - (-11.4))/2.2k = 18.8 ma
D. V out = -12-0.6 = -12.6 v
I peak = (30 - (-12.6))/2.2k...
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Negative feedback is always needed in sound amplifier to reduce the distortion and make the frequency reponse more FLAT in gain. But negative feedback reduces the gain of amplifier. But we do not want positive feedback happen in sound amplifier,because it becomes a sound oscillor produce high...