At what frequency would a capacitor of 2.5μF
used in radio circuit have a resistance of 250Ω
- π/800 Hz
-
800/π Hz
- 200π Hz
- 2000π Hz
The correct answer is: 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