Question:
The main difference in the working of a step-up transformer and CE amplifier is
The main difference in the working of a step-up transformer and CE amplifier is
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A transformer only transfers power between circuits, while a transistor amplifier draws extra power from its DC supply.
Updated On: Nov 13, 2026
the transformer decreases the power whereas the amplifier keeps the power constant.
the transformer increases the power whereas the amplifier decreases the power.
the amplifier increases the power but the transformer can not increase the power.
the amplifier decreases the power but the transformer keeps the power constant.
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
A step-up transformer raises voltage but lowers current, so output power cannot exceed input power.
Step 2: CE Amplifier
In a common-emitter amplifier, the transistor uses power from the DC bias source to give a larger output signal power than the input.
Step 3: Compare the options
Only option C states this: the amplifier increases power but the transformer cannot.
Final Answer:
The amplifier can increase power but a transformer cannot. \[ \boxed{\text{(C) }\text{the amplifier increases the power but the transformer can not increase the power}} \]
A step-up transformer raises voltage but lowers current, so output power cannot exceed input power.
Step 2: CE Amplifier
In a common-emitter amplifier, the transistor uses power from the DC bias source to give a larger output signal power than the input.
Step 3: Compare the options
Only option C states this: the amplifier increases power but the transformer cannot.
Final Answer:
The amplifier can increase power but a transformer cannot. \[ \boxed{\text{(C) }\text{the amplifier increases the power but the transformer can not increase the power}} \]
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