Understanding Dielectrics in Capacitors

The video tutorial explains the impact of dielectrics on capacitors, focusing on changes in capacitance, voltage, electric field, and potential energy. It covers scenarios where capacitors are not connected to a battery and those where they are. The tutorial provides calculations for capacitance and electric field, demonstrating how dielectric constants affect these values. It also discusses the alignment of polar molecules in an electric field and the resulting changes in potential energy.

What happens to the capacitance of a capacitor when an insulator with a dielectric constant is inserted between its plates?

• It decreases.

• It becomes zero.

• It remains the same.

• It increases.

If a capacitor is not connected to a power source, what happens to the voltage when the dielectric constant increases?

• The voltage remains the same.

• The voltage decreases.

• The voltage increases.

• The voltage becomes zero.

How is the original charge on a capacitor calculated?

• By adding capacitance and voltage.

• By multiplying capacitance by voltage.

• By dividing voltage by capacitance.

• By multiplying capacitance by resistance.

What remains unchanged when the dielectric constant of a capacitor increases, assuming it is not connected to a battery?

• Electric field

• Charge

• Voltage

• Capacitance

How is the electric field inside a capacitor calculated?

• By subtracting distance from voltage.

• By dividing voltage by distance.

• By multiplying voltage by distance.

• By adding voltage and distance.

What happens to the electric field when a dielectric material is inserted between the plates of a capacitor?

• It becomes zero.

• It remains the same.

• It decreases.

• It increases.

What is the effect of increasing the dielectric constant on the potential energy of a capacitor not connected to a battery?

• Potential energy becomes zero.

• Potential energy increases.

• Potential energy remains the same.

• Potential energy decreases.

What happens to polar molecules inside a dielectric material when placed in an electric field?

• They move out of the dielectric.

• They lose their polarity.

• They align with the electric field.

• They become randomly oriented.

When a capacitor is connected to a battery and a dielectric is added, what happens to the charge?

• The charge increases.

• The charge remains the same.

• The charge decreases.

• The charge becomes zero.

What remains constant when a dielectric is added to a capacitor connected to a battery?

• Capacitance

• Voltage

• Potential energy

• Charge