Question Detail
Question
A parallel plate air capacitor with no dielectric is connected to a constant voltage source. How would capacitance and charge change if a dielectric of K=2 is inserted, where C0 and Q0 are the initial values?
Correct Answer
Option D is the correct answer.
Detailed Explanation
At constant voltage, inserting a dielectric of constant K doubles the capacitance (C = KC0) and since Q = CV, the charge also doubles.
Hint
With voltage held fixed, C scales by K; then use Q = CV to see how charge changes.