Topic 1

Question 1

What are the main part of the atom?

Answer 1

Protons - Positive
Neutrons - Neutral
Electrons - Negative

Question 2

How can an object get an electrostatic charge?

Answer 2

Insulating materials can be given an charge by rubbing two materials together. Electrons are transferred from on material to the other. The material that has gained electrons has a negative charge.

Question 3

What is an induced charge?

Answer 3

A charged object can attract uncharged objects. This happens because the materiel induces a charge.

Question 4

What are some used of static electricity?

Answer 4

Paint Spraying & insecticide sprayer - Droplets of paint are given the same charge, the droplets repel each other so they spread out more evenly.

Question 5

What is direct current?

Answer 5

An electric current in a wire is a flow of electrons. The current supplied by the cells and batteries is direct current. In a direct current the electrons all flow in the same direction.