Two walls have the same area and thickness. The temperature difference across each wall is the same. Material X has a lower thermal conductivity than material Y.
Which statement is correct?
More energy is transferred each second through wall X.
The same energy is transferred each second through both walls.
No energy is transferred through either of the two walls.
Less energy is transferred each second through wall X.
100 exam-style questions on Edexcel GCSE Physics 3.2 Dissipation and efficiency, covering 3.2.1 Dissipation of energy, 3.2.2 Reducing unwanted energy transfers, 3.2.3 Efficiency, and 3.2.4 Increasing efficiency. Each one has a worked solution and a mark scheme showing where the marks go.