The input signal given to a `CE` amplifier having a voltage gain of `150` is `V_(i)=2cos(15t+(pi)/3)`. The corresponding output signal will be

Options

A. `300 cos (15t+(4pi)/3)`
B. `300 cos (15t+(pi)/3)`
C. `75 cos (15t+(2pi)/3)`
D. `2 cos (15t+(5pi)/3)`

Answer

A

Explanation

Input signal `V_(i n)=2 cos(15t+(pi)/3)`
Voltage gain`=150`
`CE` amplifier gives phase difference of `pi` between input and output signals
`A_(v)=(V_(0))/(V_(i n))` so `V_(0)=A_(v)V_(i n)`
so `V_(0)=150xx2cos (15 t+(pi)/3+pi)`
`V_(0)=300 cos(15t+(4pi)/3)`