The frequency of the A.C supply is doubled. What will be the effect on the reactance of the capacitor (Xc) and reactance of the inductor (XL) ?
Correct answer: D. XL is doubled and Xc is reduced to half
- A. Both Xc and XL are doubled
- B. Both Xc and XL are halved
- C. Xc is doubled and XL reduced to half.
- D. XL is doubled and Xc is reduced to half
Explanation
The reactance of a capacitor (Xc) is inversely proportional tofrequency, so it decreases when frequency increases.
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About Alternating Current
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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