Question

The Common Emitter amplifier has voltage gain equal to 300 and its input signal is \(0.5 \cos (100 t)\) volt. The output signal will be equal to (A) \(150 \cos (100 \mathrm{t})\) (B) \(300 \cos (100 \mathrm{t})\) (C) \(150 \cos (100 t+\pi)\) (D) \(300 \cos (100 t-\pi)\)

Short answer

The output signal will be equal to (A) \(150 \cos(100t)\).

Step-by-step solution

Write down the given values

We have the following information: - Voltage gain = 300 - Input signal = \(0.5 \cos(100t)\) V

Apply the voltage gain formula

Using the voltage gain formula, we can write: \( V_{output} = \text{voltage gain} \times V_{input} \)

Calculate the output signal

Now, we can plug in the given values to find the output signal: \( V_{output} = 300 \times 0.5 \cos(100t) = 150 \cos(100t) \)

Match the calculated output signal with the given options

The calculated output signal is \(150 \cos(100t)\), which corresponds to option (A). Hence, the output signal will be equal to: (A) \(150 \cos (100 \mathrm{t})\)