2d: Electrostatics

Which are electrical conductors?

• Iron
• Steel
• Wool
• Wood
• Copper

Which are electrical insulators?

• Paper
• Polythene
• Brass
• Zinc
• Aluminium

How can a polythene rod become charged?

• Friction transfers electrons
• Charged by a magnet
• Charged by electricity

Which is true?

• Like attracts Like charges
• Like attracts Unlike charges
• Like repels Like charges
• Like repels Unlike charges

Which materials can become charged?

• Conductors
• Insulators

When a material is charged, what are the only particles that move?

• Protons
• Neutrons
• Electrons
• Ions

What materials cannot become charged?

• Conductors
• Insulators

When two materials are rubbed together to charge them, what happens to the electrons?

• They become positive
• They stay where they are
• They disappear into the air
• Transferred from one material to the other

An object gains a negative charge when…

• Protons are transferred out of the object
• Electrons are transferred out of the object
• Protons are transferred to the object
• Electrons are transferred to the object

An object gains a positive charge when…

• Protons are transferred out of the object
• Electrons are transferred out of the object
• Protons are transferred to the object
• Electrons are transferred to the object