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3 cards from this section. Quick, good the night before a test.
What is a voltage amplifier and its primary function?
Think about what amplifiers do.
How does adding a load to an amplifier affect its output?
Consider the implications of voltage division.
What is the role of a voltage amplifier?
Consider the purpose of electronic amplifiers.
True or False: The loading effect always increases the output voltage.
Think about how your circuit is influenced by adding loads.
You have a voltage amplifier where the input voltage is 2V, and the gain is 15. Calculate the output voltage. Then, if you add a load of 500Ω at the output and the amplifier has an output resistance of 100Ω, determine how this affects the output voltage observed on the load.
Assume the load takes away a portion of the voltage; use the voltage divider rule.
If the input resistance of the amplifier is 1000Ω and the source resistance is 200Ω, what is the effective input voltage supplied to the amplifier?
Remember how resistances in series in the input divide the voltage.
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