Question 21M.2.SL.TZ2.d
| Date | May 2021 | Marks available | [Maximum mark: 2] | Reference code | 21M.2.SL.TZ2.d |
| Level | SL | Paper | 2 | Time zone | TZ2 |
| Command term | State | Question number | d | Adapted from | N/A |
A photovoltaic cell is supplying energy to an external circuit. The photovoltaic cell can be modelled as a practical electrical cell with internal resistance.
The intensity of solar radiation incident on the photovoltaic cell at a particular time is at a maximum for the place where the cell is positioned.
The following data are available for this particular time:
Operating current = 0.90 A
Output potential difference to external circuit = 14.5 V
Output emf of photovoltaic cell = 21.0 V
Area of panel = 350 mm × 450 mm
State two reasons why future energy demands will be increasingly reliant on sources such as photovoltaic cells.
[2]
«energy from Sun/photovoltaic cells» is renewable
OR
non-renewable are running out ✓
non-polluting/clean ✓
no greenhouse gases
OR
does not contribute to global warming/climate change ✓
OWTTE
Do not allow economic aspects (e.g. free energy)
