NEET Physics Potential Difference MCQ Question
Consider a parallel plate capacitor with a dielectric slab of dielectric constant K inserted between its plates. The slab has the same area as the plates but a thickness of (3/4)d, where d is the separation of the plates. What happens to the potential difference across the capacitor when the dielectric is inserted?
The potential difference decreases because the electric field is reduced.
The potential difference remains the same because the dielectric only affects capacitance.
The potential difference increases because the electric field is enhanced.
The potential difference becomes zero because the dielectric neutralizes the field.
Correct Answer
Detailed Explanation
The dielectric reduces the electric field, which in turn decreases the potential difference, as V = Ed and E is reduced to E/K.
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