A capacitor and an inductor are connected to the A.C. supply. If we double the frequency of the A.C. supply then the effect on the reactance of capacitor XC and reactance of inductor XL will be:
Correct answer: D. XL is doubled and XC reduces to half
- A. Both XC and XL are doubled
- B. Both XC and XL are halved
- C. XC is doubled and XL reduces to half
- D. XL is doubled and XC reduces to half
- E. Both XC and XL are unchanged
Explanation
The inductive reactance of an inductor increases as the frequency across it increases therefore inductive reactance is proportional to frequency ( XL α ƒ )The capacitive reactance of the capacitor decreases as the frequency across it increases therefore capacitive reactance is inversely proportional to frequency.
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