CAIE IGCSE Physics 4.2.1.2 Positive charges repel other positive

Practise predicting attraction or repulsion between charged rods, plates or spheres and using the observation to infer charge type.

Exam points

use a rod or sphere diagram to decide whether like charges repel or unlike charges attract
explain motion after contact with a plate by linking the new charge to attraction or repulsion
interpret charge-distribution diagrams for nearby charged metal spheres or objects

[Maximum number: 2]

A plastic rod is rubbed with a cloth. The plastic rod becomes negatively charged and the cloth becomes positively charged.

The negatively charged plastic rod is suspended by an insulating thread. Another negatively charged plastic rod is brought close to the suspended rod.

State what happens to the suspended plastic rod.

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4.2.1.2—Positive charges repel other positive question 1