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

Answer

A

Explanation

Here, voltage gain, `A_(v)=150=V_(0)/V_(i), V_(i)=2V`
`:. V_(0)=A_(v)xxV_(i)=150xx2=300 V` We know that the output signal voltage in CE amplifier is `180^(@)` out of phase w.r.t. input signal voltage. Hence the output signal will be
`=300 cos(15t+pi/3+pi) =300 cos(15t+(4pi)/3)`