An electric fryer contains 1200 g1200\text{ g}1200 g of cooking oil at 20∘C20^\circ\text{C}20∘C. The heating element in the fryer operates at a voltage of 240 V240\text{ V}240 V with a current of 11 A11\text{ A}11 A. The specific heat capacity of the oil is 2200 J/(kg⋅∘C)2200\text{ J}/(\text{kg}\cdot^\circ\text{C})2200 J/(kg⋅∘C).
Calculate the time taken for the temperature of the oil to rise to 170∘C170^\circ\text{C}170∘C.
State one assumption you made in your calculation in (a)(i).
Describe an experiment to demonstrate how the surface texture and color of a container affect the rate at which it emits thermal radiation. In your description, include the key apparatus used, the procedure, the measurements recorded, and the expected conclusion.
119 exam-style questions on CIE IGCSE Physics 2.2.2a Internal energy and temperature. Each one has a worked solution and a mark scheme showing where the marks go.