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

Question

Two amplifiers are connected one after the other in series. The first amplifier has a voltage gain of 10 and second has voltage gain of 20 . If the input signal is 0.01 V then output signal is :- (A) 0.2V (B) 20V (C) 10V (D) 2 V

Tardigrade Admin · Accepted Answer

Total A v = A v 1 × A v 2 =10 × 20=200 So, ( text Output Signal / text Input Signal )= A v ⇒ ( text Output Signal /0.01)=200 ⇒ Output Signal =2 V

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

0.2V

20V

10V

2 V

Total $A_{v} = A_{v_{1}} \times A_{v_{2}}$
$= 10 \times 20 = 200$
So, $\frac{Output Signal}{Input Signal} = A_{v}$
$\Rightarrow \frac{Output Signal}{0.01} = 200$
$\Rightarrow$ Output Signal $= 2 V$

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

0.2V

20V

10V

2 V

Total Av​=Av1​​×Av2​​ =10×20=200 So, Input Signal Output Signal ​=Av​ ⇒0.01 Output Signal ​=200 ⇒ Output Signal =2V

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

Total $A_{v} = A_{v_{1}} \times A_{v_{2}}$
$= 10 \times 20 = 200$
So, $\frac{Output Signal}{Input Signal} = A_{v}$
$\Rightarrow \frac{Output Signal}{0.01} = 200$
$\Rightarrow$ Output Signal $= 2 V$