Exam-style question
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What is the effect of introducing a dielectric material between the plates of a capacitor?.
- A.It increases the capacitance by reducing the electric field strength.
- B.It decreases the capacitance by increasing the potential difference.
- C.It has no effect on the capacitance of the capacitor.
- D.It increases the capacitance by allowing more charge to be stored.
Model answer
What a good answer should say
- It increases the capacitance by allowing more charge to be stored.
Explanation
Why this works
Introducing a dielectric material increases the capacitance because the dielectric reduces the electric field strength between the plates. This allows the capacitor to store more charge for the same potential difference, resulting in a higher capacitance.
The consequence is that the capacitor can store more energy, making it more effective in applications requiring energy storage.
Common mistake
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