DP Physics (first assessment 2025)

Question EXE.2.HL.TZ0.20biv

Date	Example questions Example questions	Marks available	[Maximum mark: 2]	Reference code	EXE.2.HL.TZ0.20biv
Level	HL	Paper	2	Time zone	TZ0
Command term	Determine	Question number	iv	Adapted from	N/A

iv.

[Maximum mark: 2]

EXE.2.HL.TZ0.20biv

(iv)

Determine, in J, the kinetic energy of the electron after the interaction.

[2]

Markscheme

(Because energy is conserved)

$E_{k} = h c (\frac{1}{λ_{i}} - \frac{1}{λ_{f}})$

$= 6.63 \times 10^{- 34} \times 3.00 \times 10^{8} (\frac{1}{6.00 \times 10^{- 12}} - \frac{1}{8.43 \times 10^{- 12}})$ ✓

9.6 fJ ✓

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