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How can DC charge a capacitor?
I read that a capacitor shows infinite resistance towards DC. While solving questions we use DC to charge the capacitor and use a constant potential difference and current. This contradicts that DC cannot charge a capacitor. Is there any clear idea on how DC cannot charge a capacitor?
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2 Answers
But DC current can charge a capacitor.
Just like a water hose with steady flow of water can fill up a bucket.
AC is just a water hose that both fills the bucket (charges the cap) and then sucks the bucket empty (discharges the cap).
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An ideal capacitor appears initially to have zero resistance. It's like filling a bucket with water. By the time it's full no more can be added. AC means the bucket is being emptied and filled repeatedly
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How can DC charge a capacitor?
I read that a capacitor shows infinite resistance towards DC. While solving questions we use DC to charge the capacitor and use a constant potential difference and current. This contradicts that DC cannot charge a capacitor. Is there any clear idea on how DC cannot charge a capacitor?
1193 bronze badges
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But DC current can charge a capacitor.
Just like a water hose with steady flow of water can fill up a bucket.
AC is just a water hose that both fills the bucket (charges the cap) and then sucks the bucket empty (discharges the cap).
164k6 gold badges124 silver badges332 bronze badges
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