DP Physics (last assessment 2024)

Question 21N.2.SL.TZ0.4b.i

Date	November 2021	Marks available	[Maximum mark: 2]	Reference code	21N.2.SL.TZ0.4b.i
Level	SL	Paper	2	Time zone	TZ0
Command term	Determine	Question number	b.i	Adapted from	N/A

b.i.

[Maximum mark: 2]

21N.2.SL.TZ0.4b.i

A charged particle, P, of charge +68 μC is fixed in space. A second particle, Q, of charge +0.25 μC is held at a distance of 48 cm from P and is then released.

(b.i)

Determine the force on Q at the instant it is released.

[2]

Markscheme

$F = \frac{8.99 \times 10^{9} \times 68 \times 10^{- 6} \times 0.25 \times 10^{- 6}}{0 . 48^{2}}$ ✓

$F = 0.66$ «N» ✓

Award [2] marks for a bald correct answer.

Allow symbolic k in substitutions for MP1.

Do not allow ECF from incorrect or not squared distance.

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Core

Core » Topic 5: Electricity and magnetism » 5.1 – Electric fields

Core » Topic 5: Electricity and magnetism

Question 21N.2.SL.TZ0.4b.i

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