which of the two ,capacitor or …
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which of the two ,capacitor or inductor, tends to become short circuit when the frequency of the alternating voltage has a very high value
Posted by Sparsh Gupta 5 years, 10 months ago
- 2 answers
Dev Yadav 5 years, 10 months ago
Answer is capacitor
Because in capacitor current is ahead to voltage
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Yogita Ingle 5 years, 10 months ago
Capacitor.
Capacitors act like a short at high frequencies and an open at low frequencies. At high frequencies, the capacitor only has time to get a very little charge on it i.e. it has very little counter voltage. At low frequencies, there is sufficient time for a considerable amount of charge to collect on the capacitor. It indicates that there is a large reverse voltage on the capacitor. Therefore the sum of the voltage of capacitor and the voltage of the ac source is nearly zero. That means the current will be nearly zero.
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