The unit of electrical resistance is the ohm ( $Ω\Omega$ ).

Starting with the definition of electrical resistance, we can obtain an equivalent unit as $A−1\text{V A}^{-1}$ (volt per ampere).

Using $differencecurrent\displaystyle \text{resistance} = \frac{\text{potential difference}}{\text{current}}$

$A−1\displaystyle \text{unit of resistance} = \frac{\text{unit of potential difference}}{\text{unit of current}} = \text{V A}^{-1}$

The unit of electrical resistivity is the ohm-metre ( $Ω⋅m\Omega\cdot\text{m}$ ).

Explain how, starting with the definition of electrical resistivity, we may obtain this equivalent unit of resistivity in terms of the ohm ( $Ω\Omega$ ) and the metre ( $m\text{m}$ ).

The unit of electrical resistance is the ohm ( $Ω\Omega$ ).

Starting with the definition of electrical resistance, we can obtain an equivalent unit as $A−1\text{V A}^{-1}$ (volt per ampere).

Using $differencecurrent\displaystyle \text{resistance} = \frac{\text{potential difference}}{\text{current}}$

$A−1\displaystyle \text{unit of resistance} = \frac{\text{unit of potential difference}}{\text{unit of current}} = \text{V A}^{-1}$

The unit of electrical resistivity is the ohm-metre ( $Ω⋅m\Omega\cdot\text{m}$ ).

Explain how, starting with the definition of electrical resistivity, we may obtain this equivalent unit of resistivity in terms of the ohm ( $Ω\Omega$ ) and the metre ( $m\text{m}$ ).

10.2 Resistance

Question 31

Markscheme

10.2 Resistance

Question 31

Markscheme

10.2 Resistance

Question 31

10.2 Resistance Questions

10.2 Resistance

Question 31

10.2 Resistance Questions