At what frequency 1 henry inductance offer same impendance as 1μF capacitor:
Correct answer: D. 159 Hz
- A. 450 Hz
- B. 512 Hz
- C. 1 KHz
- D. 159 Hz
Explanation
The impedance ((Z)) of an inductor ((L)) and a capacitor ((C)) in series is given by the formula:For impendance to be same XL and Xc Must be equal2πfL = 1/2πfCSolving for ff = 1/2π√LCNow put the valuesf = 1/2π√ (1H) × (1×10-⁶F)f = 159 Hz
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Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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