DP Physics (first assessment 2025)

Question EXE.2.HL.TZ0.iv

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

iv.

[Maximum mark: 2]

EXE.2.HL.TZ0.iv

In one particular event, a maximum emf of 65 mV is generated in the geophone. The geophone coil has 150 turns.

Calculate the rate of flux change that leads to this emf.

[2]

Markscheme

Use of $ε = - \frac{Δ (N Φ)}{Δ t}$ ✓

$\frac{ΔΦ}{Δ t} = (-) \frac{65 \times 10^{- 3}}{150}$

$= 0.43$ mWb s⁻¹ ✓

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