Define the term capacitance of a capacitor.

This is a circuit that can be used to measure the capacitance of a capacitor.

The reed switch vibrates back and forth at a frequency of $50 \mathrm{Hz}$. Each time it makes contact with A, the capacitor is charged by the battery so that there is a p.d. of $12 \mathrm{V}$ across it. Each time it makes contact with B, it is fully discharged through the resistor.

Calculate the charge that is stored on the capacitor when there is a p.d. of $12 \mathrm{V}$ across it.

This is a circuit that can be used to measure the capacitance of a capacitor.

The reed switch vibrates back and forth at a frequency of $50 \mathrm{Hz}$. Each time it makes contact with A, the capacitor is charged by the battery so that there is a p.d. of $12 \mathrm{V}$ across it. Each time it makes contact with B, it is fully discharged through the resistor.

Calculate the average current in the resistor.

This is a circuit that can be used to measure the capacitance of a capacitor.

The reed switch vibrates back and forth at a frequency of $50 \mathrm{Hz}$. Each time it makes contact with A, the capacitor is charged by the battery so that there is a p.d. of $12 \mathrm{V}$ across it. Each time it makes contact with B, it is fully discharged through the resistor.

Calculate the average power dissipated in the resistor.

A second capacitor of the same value is connected in series with the first capacitor.

Discuss the effect on both the current recorded and the power dissipated in the resistor.

Explain what is meant by the time constant of a circuit containing capacitance and resistance.

 A circuit contains capacitors of capacitance $500\mu \mathrm{F}$ and $2000\mu \mathrm{F}$ In series with each other and in series with a resistance of $2.5\mathrm{k}\Omega$.

Calculate the effective capacitance of the capacitors in series.

A circuit contains capacitors of capacitance $500\mu \mathrm{F}$ and $2000\mu \mathrm{F}$ In series with each other and in series with a resistance of $2.5\mathrm{k}\Omega$.

Calculate the charge on the capacitor plates when there is a potential difference of $50 \mathrm{V}$ Across the plates.

A circuit contains capacitors of capacitance $500\mu \mathrm{F}$ and $2000\mu \mathrm{F}$ in series with each other and in series with a resistance of $2.5\mathrm{k}\Omega$. Calculate the time taken for the charge on the plates to fall to $5\%$ of the charge when there was a p.d. of $50 \mathrm{V}$ across the plates.