Physics-(general)
NEET Physics (general) MCQ Question
Type: MCQ-numerical-Hard-Class 12
A parallel plate capacitor is initially connected to a battery providing a potential difference of 100 V, then disconnected from the battery. If a dielectric material with a dielectric constant of 5 is inserted between the plates, what is the new potential difference across the plates?
A
20 V
B
100 V
C
500 V
D
200 V
Correct Answer
Option A
Detailed Explanation
When a dielectric is inserted into a disconnected capacitor, the potential difference decreases by a factor equal to the dielectric constant, hence V_new = V_old / K = 100 V / 5 = 20 V.
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