Two amplifiers are connected one after the other in series. The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20. If the input signal is 0.01V. Calculate the output ac signal.

Options

A. 1 V
B. 2 V
C. 3 V
D. 4 V

Answer

B

Explanation

Here , `A_(v_1) = 10 and A_(v_2) = 20 `
`:.` Net voltage gain `A_v = A_(v_1)xxA_(v_2) = 10xx20=200`
Now using `A_v = (V_o)/V_i`
`:. V_o=A_v.V_i=0.01 xx200=2V`