The output power of a transistor amplifier is more than the input power due to additional power supplied by

Related MCQs

• An amplifier without feedback has a voltage gain of 50, input resistance is 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is
• A transistor amplifier has a voltage gain of 100. If the input voltage is 75 mV, the output voltage is:
• The complementary Darlington-connected transistor for a class B amplifier provides output current and output resistance.
• A class C amplifier has a tank circuit in the output. The amplifier is conducting only 28°. The output voltage is
• A silicon power transistor is operated with a heat sink (θSA = 1.5ºC/W). The transistor, rated at 150 W (25ºC), has θJC = 0.5º C/W, and the mounting insulation has θCS = 0.6 ºC/W. What is the maximum power that can be dissipated if the ambient temperature is 50ºC and TJmax = 200 ºC?
• An emitter-follower amplifier has an input impedance of 107 kΩ. The input signal is 12 mV. The approximate output voltage is (common-collector)
• The ratio output rms power in watts to the input dc power in watts in the different amplifier class is called .
• A class amplifier is biased slightly above cutoff and operates in the linear region for slightly more than 180º of the input cycle.
• A class A power amplifier uses transistor(s).
• You have an application for a power amplifier to operate on FM radio frequencies. The most likely choice would be a             amplifier.