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In a circuit, if a capacitor is fully charged, what is the voltage across it?

Practice Questions

Q1
In a circuit, if a capacitor is fully charged, what is the voltage across it?
  1. Zero
  2. Equal to the source voltage
  3. Half of the source voltage
  4. Double the source voltage

Questions & Step-by-Step Solutions

In a circuit, if a capacitor is fully charged, what is the voltage across it?
  • Step 1: Understand what a capacitor is. A capacitor is a device that stores electrical energy.
  • Step 2: Know that a capacitor can be charged by connecting it to a voltage source, like a battery.
  • Step 3: When the capacitor is connected to the voltage source, it starts to store energy and builds up a charge.
  • Step 4: A fully charged capacitor means it has stored as much energy as it can from the voltage source.
  • Step 5: The voltage across the fully charged capacitor is the same as the voltage of the source it was connected to.
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