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The input signal given to a CE amplifier having a voltage gain of 150 is Vi = 2 cos [15t + π/3]. The corresponding output signal will be:

1. 75cos [15t + 2π/3]
2. 2cos [15t + 5π/6]
3. 300cos [15t + 4π/3]
4. 300cos [15t + π/3]

Correct answer: 300cos [15t + π/3]

Solution

In a CE amplifier, the output signal is amplified by the voltage gain and retains the same phase as the input signal. Given the voltage gain of 150 and input signal Vi = 2cos[15t + π/3], the output signal is 150 × 2 = 300cos[15t + π/3].

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