An electric circuit, whether its a simple lightbulb or a complex amplifier, has two input terminals that
Question:
An electric circuit, whether it’s a simple lightbulb or a complex amplifier, has two input terminals that are connected to the two output terminals of the voltage source. The impedance between the two input terminals (often a function of frequency) is the circuit’s input impedance. Most circuits are designed to have a large input impedance. To see why, suppose you need to amplify the output of a high-pass filter that is constructed with a 1.2 kΩ resistor and a 15 μF capacitor. The amplifier you’ve chosen has a purely resistive input impedance. For a 60 Hz signal, what is the ratio VR load/VR no load of the filter’s peak voltage output with (load) and without (no load) the amplifier connected if the amplifier’s input impedance is
(a) 1.5 kΩ
(b) 150 kΩ?
Step by Step Answer:
Physics for Scientists and Engineers A Strategic Approach with Modern Physics
ISBN: 978-0133942651
4th edition
Authors: Randall D. Knight