To determine the resistance $R$ of a resistor, an ammeter and a voltmeter can be used. Draw a circuit diagram to show how you would use these instruments, together with a power supply, to determine $R$.

To determine the resistance $R$ of a resistor, an ammeter and a voltmeter can be used. What quantity does the ammeter measure?

To determine the resistance $R$ of a resistor, an ammeter and a voltmeter can be used. What quantity does the voltmeter measure?

To determine the resistance $R$ of a resistor, an ammeter and a voltmeter can be used. If voltmeter gave a reading of $6.5 \mathrm{V}$ and the ammeter gave a reading of $1.25 \mathrm{A}$, what would be the value of $R$?

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. Into what useful form of energy does a filament lamp transform electrical energy?

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. Into what other, less useful, form is electrical energy transformed by the lamp?

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. A lamp is labelled $\text{'}12 \mathrm{V}, 36 \mathrm{W}\text{'}$. This indicates that it should be used with a $12 \mathrm{V}$ supply. What other information does the label provide?

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. A lamp is labelled $\text{'}12 \mathrm{V}, 36 \mathrm{W}\text{'}$. How much electrical energy does the lamp transform in $1$ minute?

Electrical appliances are used to transform electrical energy into other, more useful, forms of energy. A lamp is labelled $\text{'}12 \mathrm{V}, 36 \mathrm{W}\text{'}$. It is connected to a $12 \mathrm{V}$ supply. Use the relationship $\mathrm{P}=\mathrm{IV}$ to calculate the current that flows through it.