DP Physics (first assessment 2025)

Test builder »

Question 22N.2.SL.TZ0.a.i

Select a Test
Date November 2022 Marks available [Maximum mark: 3] Reference code 22N.2.SL.TZ0.a.i
Level SL Paper 2 Time zone TZ0
Command term Determine Question number a.i Adapted from N/A
a.i.
[Maximum mark: 3]
22N.2.SL.TZ0.a.i

Determine the minimum area of the solar heating panel required to increase the temperature of all the water in the tank to 30°C during a time of 1.0 hour.

[3]

Markscheme

energy required = 250 × 4200 × (30 − 15) ✓

energy available = 0.30 × 680 × t × A ✓

A = «250×4200×150.30×680×60×60=» 21 «m2» OR 22 «m2» ✓

 

Allow ECF from MP1 and MP2.

Accept the correct use of 0.30 in either MP1 or MP2.

Examiners report

Most candidates had a good attempt at this but there were often slight slips. Some missed the efficiency of the process. Some included the albedo of the roof tiles. Some thought that the temperature rise needed to have 273 added to convert to kelvin. However, sometimes scoring through ECF (error carried forward), the average mark was around 2 marks.

Syllabus sections