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  • A capacitor has some dielectric between its plates, and the capacitor is connected to a DC source. The battery is now disconnected and then the dielectric is removed.

A capacitor has some dielectric between its plates, and the capacitor is connected to a DC source. The battery is now disconnected and then the dielectric is removed. State whether the capacitance, the energy stored in it, the electric field, the charge stored, and the voltage will increase, decrease, or remain constant.

Answers (1)

Quantity Battery is removed Battery remains connected
 
Capacity C'=KC

C'=KC
Charge Q'=Q

Q'=KQ
Potential V'=\frac{V}{K} V'V
Intensity E'=\frac{E}{K} E'=E
Energy U'=\frac{U}{K} U'=UK

Explanation:-

After the battery is disconnected and the dielectric is removed, we will analyze the changes in various parameters: capacitance, energy stored, electric field, charge stored, and voltage. When the dielectric is removed, the capacitance decreases because the dielectric constant κ\kappaκ is no longer present. Therefore, the capacitance will decrease.

 

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