(b)
Photovoltaic cells transfer light
energy to electrical energy.
In the UK, some householders have
fitted modules containing photovoltaic
cells on the roofs of their houses.
Four modules are shown in the
diagram.
(2)
Module containing
photovoltaic cells
The electricity company pays the
householder for the energy transferred.
The maximum power available from the photovoltaic cells shown in the diagram is 1.4 x
10³ W.
How long, in minutes, does it take to transfer 168 kJ of energy?