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WAEC - Physics (1991 - No. 40)

If the frequency of the e.m.f. source in the a.c. circuit illustrated above is \(\frac{500}{\pi}\)Hz. What is the reactance of the inductor?
450
0.9
900
567
43

解释

x = 2\(\pi f L = 2\pi \times \frac{500}{\pi} \times 0.9\)

= 900\(\Omega\)

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