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Electric charge

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Question 28

A student is investigating static electricity using a polythene rod, an acetate rod, and dry cloths.

a.

Describe a simple observation that would show the polythene rod has become electrostatically charged after being rubbed with a cloth.

[2]
b.

Explain, in terms of particles, how the polythene rod gains a negative charge when rubbed with a woollen cloth.

[2]
c.

Describe an experimental method the student could use, with the setup shown in the diagram below, to demonstrate that there are two opposite types of electrostatic charge.

A diagram showing a polythene rod suspended horizontally by a thin thread from a laboratory stand, allowing it to swing and rotate freely. Another rod is held by a hand and its charged end is brought close to the charged end of the suspended rod to show the force of interaction between them.

[4]

Electric charge Questions

  1. IGCSE
  2. /Physics
  3. /Electric charge