PHYSICS 10 SCIENCE · 2026–27 · C · Constructed responses · QUESTION 11.2 · EM p. 31

How does the size (surface area) of a radiator affect the amount of heat it emits through radiation? Explain using a real-world example.

ریڈی ایٹر کا سطحی رقبہ اشعاع سے خارج ہونے والی حرارت پر کیسے اثر ڈالتا ہے؟ حقیقی زندگی کی مثال سے وضاحت کریں۔

Solution & explanation

At fixed temperature and surface properties, a larger area emits more total power. A radiator uses fins to enlarge exposed area; its heat transfer may also include convection.

Independent study answer. Original textbook ↗ · English-medium printed page 31.