Physics

Problem

Which one of the following expressions gives the capacitive reactance

X_C

of a capacitor of capacitance

C

connected to an alternating source of frequency

f

? a)

X_C = 2\pi f C

X_C = \dfrac{1}{f C}

X_C = \dfrac{1}{2\pi f C}

X_C = \dfrac{2\pi f}{C}