A parallel plate capacitor is charged and the charging battery is disconnected. Then a dieletric slab is introduced between the plates, The quantity that remains unchanged is_
Correct answer: D. Charge
- A. Electric field
- B. Capacity
- C. Energy
- D. Charge
Explanation
Option D is correct as The quantity that remains unchanged when a dielectric slab is introduced between the plates of a charged parallel plate capacitor is the charge on the plates.This is because the charge on the plates is determined by the amount of current that flowed through the capacitor when it was being charged. Once the battery is disconnected, the current stops flowing and the charge on the plates remains constant.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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