Exam-style question
Try this first
During the charging of a capacitor, which of the following statements is true?.
- A.The current decreases exponentially over time.
- B.The voltage across the capacitor remains constant.
- C.The charge on the capacitor increases linearly.
- D.The energy stored decreases as the capacitor charges.
Model answer
What a good answer should say
- The current decreases exponentially over time.
Explanation
Why this works
As a capacitor charges, the current flowing into it decreases exponentially over time due to the increasing voltage across the capacitor, which opposes the flow of current. This is a characteristic behavior of capacitors during the charging process.
Common mistake
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