At what frequency would a capacitor of 2 5 F us... - JAMB Physics 2002 Question
At what frequency would a capacitor of 2.5μF
used in radio circuit have a resistance of 250Ω
used in radio circuit have a resistance of 250Ω
A
π/800 Hz
B
800/π Hz
C
200π Hz
D
2000π Hz
correct option: b
| 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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