DP Physics (first assessment 2025)

Question 21N.1A.HL.TZ0.37

Date	November 2021	Marks available	[Maximum mark: 1]	Reference code	21N.1A.HL.TZ0.37
Level	HL	Paper	1A	Time zone	TZ0
Command term		Question number	37	Adapted from	N/A

37.

[Maximum mark: 1]

21N.1A.HL.TZ0.37

In a photoelectric experiment a stopping voltage $V$ required to prevent photoelectrons from flowing across the photoelectric cell is measured for light of two frequencies $f_{1}$ and $f_{2}$ . The results obtained are shown.

The ratio $\frac{V_{2} - V_{1}}{f_{2} - f_{1}}$ is an estimate of

A. $e$

B. $h$

C. $\frac{e}{h}$

D. $\frac{h}{e}$

[1]

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Syllabus sections

E. Nuclear and quantum physics » E.2 Quantum physics

Question 21N.1A.HL.TZ0.37

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