Question

A 200 ohm resistor is connected in series with a 5 micro meter f capacitor .The voltage across the resistor is Vr=(1.20 V) cos (2500 rad/s)t.capacitive Reactance is

Answer 1

Answer:

So capacitive reactance will be 800 ohm

Explanation:

We have given resistance R = 200 ohm

And Capacitance $C=5\mu F=5\times 10^{-6}F$

Expression of voltage V = 120 cos (250 t )

Standard equation of voltage is $v=v_mcos(\omega t)$

On comparing with standard equation $\omega =250$

We know that capacitive reactance is given by $X_C=\frac{1}{\omega C}=\frac{1}{250\times 5\times 10^{-6}}=800ohm$

So capacitive reactance will be 800 ohm