Physical Sciences

Grade 11 Physical Sciences topics

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Question 1.7 · November 2025 · Paper 1 · National (DBE) · 2 marks

Various options are provided as possible answers to the following questions. Each question has only ONE correct answer. Choose the answer and write only the letter (A–D) next to the question numbers (1.1 to 1.10) in the ANSWER BOOK, e.g. 1.11 E.

1.7 Three point charges,

Q_{1}

Q_{2}

and

Q_{3}

, are fixed in a straight line.

Q_{1}

is r metres from

Q_{2}

, while

Q_{3}

is 2r metres from

Q_{2}

, as shown in the diagram below.

The magnitude of the charge on

Q_{2}

is q. The net electrostatic force on charge

Q_{1}

is zero.

What is the magnitude of charge

Q_{3}

in terms of q?(2) Diagram for question 1.7

A $\frac{1}{9}$ q
B $\frac{1}{3}$ q
C 3q
D 9q

Work it out on paper first. Then mark yourself with the official memo, one tick at a time.

Paper 1 (Physics) topics

Paper 2 (Chemistry) topics

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