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At what frequency would a capacitor of 2.5μF used in radio circuit have a resistance...

Physics
JAMB 2002
At what frequency would a capacitor of 2.5μF
used in radio circuit have a resistance of 250Ω
  • A. π/800 Hz
  • B. 800/π Hz
  • C. 200π Hz
  • D. 2000π Hz
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Correct Answer: Option B
Explanation
Capacitive Reactance = ___1
2π + C

=> 250 = ____1
2 x π x f x 2.5 x 106

∴ 250/1 = 106/5.0xf
=> F = ___106
250 x 5.0 x π

= 106
1250π

800/π
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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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Join your school's WhatsApp group
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts