(a)[1]
Define the volt in terms of potential difference.
(b(i))[1]
Fig. 5.1 displays a circuit of three resistors. Calculate the combined resistance of the two resistors that are connected in parallel.
(b(ii))[1]
Calculate the overall resistance between terminals X and Y.
(c(i)-1)[3]
The circuit in (b) is connected to a power supply, so there is a potential difference between terminals X and Y. The power dissipated in the $55\,\Omega$ resistor is $0.20\,\text{W}$. Calculate the current in the $55\,\Omega$ resistor.
(c(i)-2)
Calculate the current in the $300\,\Omega$ resistor.
(c(ii))[1]
Calculate the potential difference across X and Y.
(ii)[1]
Calculate the potential difference across X and Y.