Capacitive Reactance refers to the opposition of capacitance to alternating current which is equal to the reciprocal of the product of the angular frequency of the current times of the capacitance. The Capacitive Reactance is denoted by the symbol 'Xc'. The relationship of capacitive reactance to resistance is because capacitive reactance is the resistance of the capacitor.
Capacitive Reactance:
X_{c} = 1/2π fC
Frequency:
f = 1/2π X_{c}C
Capacitance:
C = 1/2π X_{c}C
Where,
X_{C} = Capacitive Reactance,
f = Frequency,
C = Capacitance.
Current passing through any two parallel transmission line due to the dielectric property of conductor then the capacitance effect is generated between them is called as capacitance reactance.
Example:
Calculate the Capacitive Reactance for the given details.
Frequency (f) = 100 Hz
Capacitance(C) = 50 H
Solution:
Apply Formula:
X_{c} = 1/2πfC
X_{c} = 1/6.28*5000
X_{c} = 1/31400
X_{c} = 3.1847 ohm
Capacitive Reactance X_{c} = 3.1847 ohm