At a high frequency, as compared to the normal frequency, the value of capacitive reactancein alternating current circuit becomes
Correct answer: A. Zero.
- A. Zero.
- B. More.
- C. Less.
- D. Infinite.
Explanation
Capacitive reactance (XC) is given by the formula XC = 1/(2πfC), where f is the frequency and C is the capacitance. As the frequency (f) increases, XC decreases. At very high frequencies, the capacitive reactance approaches zero, making Option A correct. Option B is incorrect because reactance does not increase with frequency. Option C, while indicating a decrease, does not specify the extent of the decrease at high frequencies as precisely as Option A. Option D is incorrect as the reactance becomes very small, not infinite.
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About AC Through Resistor, Capacitor and Inductor
Alternating current through a resistor, capacitor and inductor involves phase relationships between voltage and current, reactance, impedance and energy transfer. A resistor keeps voltage and current in phase, while a capacitor and inductor produce opposite phase shifts, a distinction used in circuit diagrams and numerical calculations.
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