Electric Potential and Capacitance - Quick revision

Front

What is the formula for the energy stored in a capacitor?

Back

U = \frac{1}{2} C V^2

Front

What is the expression for the polarization vector in a dielectric material?

Back

P = \chi_{o} E

Front

What happens when a capacitor is charged beyond its limit?

Back

The dielectric material may break down, allowing charge to flow and potentially damaging the capacitor.

Front

What is the electric field between the plates of a parallel plate capacitor?

Back

E = \frac{\sigma}{\epsilon_{o}}

Front

What is the formula for the capacitance of a parallel plate capacitor?

Back

C = \frac{\epsilon_{o} A}{d}

Front

What does the symbol 'C' represent in capacitor equations?

Back

C represents the capacitance of the capacitor.

Front

What does the symbol 'U' represent in the context of capacitors?

Back

U represents the energy stored in the capacitor.

Front

What does the symbol 'E' represent in the context of electric fields?

Back

E represents the electric field strength.

Front

What does the symbol 'σ' represent in the formula for electric field in a capacitor?

Back

σ represents the surface charge density on the plates of the capacitor.

Front

What is the role of the dielectric in a capacitor?

Back

The dielectric increases the capacitor's capacitance by reducing the electric field strength between the plates.