Question

i need a help

is the relationship between capacitive r and capacitance? ea Part C: Dependence of Capacitive Reactance on the Frequemcy 1. Set up the experiment with the capacitance C-1 2. Adjust various frequencies f at the function generator 3. In each case determine the voltage drops 'at the capacitor Vc (peak to peak) using procisely by reading the period on the oscilloscope. 3Table 2: R-2.2 k-Q C-1-laF 2.5 62Gs 1-25 100 100 57.1s :1 a sheet of graph paper for plotting Xc versus 1/f. You should make Xc on the vertical axis and ljfthe horizontal axis. Each axis should be labeled and appropriate units indicated. The graph should have a title ELE-202 Circuit-Il Lab Spring 2018-1 praw the waveforms wotage respectively for 200 Hz & 1kHz frequencies. observed on CHI & CH2 of CRO indicating the Source Voltage and Capacitance Fig. Waveforms at 1000 Hz Waveforms at 200 Hz Fig. In an RC Circuit, excited with an AC Source, what happens to Voltage across a capacitor when frequency of source voltage increases? ELE-202

Answer 1

Capacitive Reactance X_c and Capacitance C is related as X_c=1/(2*pi*f*C) where f indicates the frequency of the input signal.

The graph with the given value in the box is plotted using matlab software.

The code is given below which is attached with the plot of Xc theoretical vs 1/f and plot of Xc practical vs 1/f.

f=[200 400 600 800 900];
Xc_theo=[795.77 397.88 265.25 198.94 159.15];
Vc=[3.187 1.674 1.31 0.862 159.15];
Xc_exp=[789.15 397.14 265.63 198.774 159.1];
deviation=[-0.84 -0.186 0.143 -0.1 -0.189];
% plotting Xc theoretical vs 1/f
figure();
plot(1./f,Xc_theo);
hold on
plot(1./f,Xc_theo,'*');
title 'Xc Theoretical vs 1/f '
xlabel '1/f \rightarrow'
ylabel 'Xc \rightarrow'
legend 'Theoretical'
figure();
plot(1./f,Xc_exp);
hold on
plot(1./f,Xc_theo,'*');
title 'Xc Experimental vs 1/f '
xlabel '1/f \rightarrow'
ylabel 'Xc \rightarrow'
legend 'Practical'

Xc Theoretical vs 1/f 800 r 朱 Theoretical 700 600 500 400 300 200 100 1 1.5 2 2.5 3 3.5 44.5 -3 1/f → x10

Xc Experimental vs 1/f 800 r Practical 700 600 500 400 案 300 200 100 1 1.5 2 2.5 3 3.5 44.5 -3 1/f x 10

From the relation between capacitive reactance and capacitance, it is clear that as the frequency increases, the capacitive reactance will be decreasing. Hence, the voltage drop across the capacitor will be decreasing as the capacitive reactance is decreasing.

Please give upvote.....thank you!!!!!!!