Question:

The reactance of a 1μF capacitor connected across a 50 Hz supply is?

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A. 3.18

B.31.8

c.318

D.3.18

How does the working out go?

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  1. The formula is Xc = - 1/(2*pi*f*C)

    where

    pi = 3.1415

    f   = 50 Hz

    C = .000001 Farads (1 micro Farad)

    I get -3.183 kohms, or 3183 ohms.

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