Question 50
Alternating Current CircuitsAt what frequency would a capacitor of 2.5μF used in a radio circuit have a reactance of 250Ω?
- A.800/π Hz
- B.200π Hz
- C.2000π Hz
- D.π/800 Hz
Show the answer and explanation
Answer: A (800/π Hz)
Explanation
XC = 1/(2πfC), so f = 1 ÷ (2π × 250 × 2.5 × 10−6) = 800/π Hz.