Question 485: AC fundamentals

Question

A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be

Accepted Answer

Reactance X = $${1 \over {\omega C}} = {1 \over {2\pi fC}}$$
$$ 	herefore $$ X $$ \propto $$ $${1 \over {fC}}$$
$$ 	herefore $$ $${{{X_1}} \over X} = {{fC} \over {{f_1}{C_1}}}$$ = $${{fC} \over {2f 	imes 2C}}$$ = $${1 \over 4}$$
$$ \Rightarrow $$ X
1
= $${X \over 4}$$

Answer

4X

Answer

X/2

Answer

X/4

Answer

2X

AC fundamentals

A capacitor of capacity C has reactance X. If capacitance and frequency become double then reactance will be

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