General: True or False. Mark TRUE only if the statement is always true. Otherwis

Question

General: True or False. Mark TRUE only if the statement is always true. Otherwise, mark FALSE. The impedance of a circuit element is a function of frequency. The current through and the voltage across a capacitor are "in phase" with each other. An inductor is essentially an open in a DC circuit. Op-amps have 5 connections: 2 for input, 1 for output, and 2 for power supply. An ideal amplifier should have an infinite input impedance and an infinitesimal output impedance. The MATLAB code for plotting a circuit's frequency response could be: >> A = [1 2 1]; >> B = [2 0]; >> frees (B, A) A non-inverting amplifier uses positive feedback. An inverting amplifier uses negative feedback. The gain of a practical op-amp is about 10^6. A non-inverting amplifier has the source connected to the v^+ terminal of the op-amp. A practical integrator circuit should have a very large feedback resistor in parallel with the feedback capacitor. A differentiator circuit passes lots of high-frequency noise, and so must be used sparingly and carefully.

Explanation / Answer

A) for L and C true but only of R false

B) false , they are 90 degree apart from each other.

C)false , close in dc, impedance is 2*pi*f*L and f=0

D)true

E) true

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