CAPE Physics Unit 2 · 2010 · Paper 2 · Question 2(b)(iv)

The current I through a p-n junction diode relates to voltage V by I = I₀ exp(eV / nkT). DC measurements at 300 K are recorded in Table 2.

Determine the ideality factor n using data: k = 1.38 × 10⁻²³ J K⁻¹ and elementary charge e = 1.60 × 10⁻¹⁹ C at T = 300 K.

This question uses a figure or table from the paper — you'll see it when you practise.