Electric Force 8T4.1

To demonstrate static electricity, a teacher takes an inflated balloon and rubs it against his hair.  The rubber balloon picks up electrons from his hair, which makes his hair have

• a net negative charge
• a magnetic force
• a net positive charge

A balloon has a negative charge.  The glass rod has a positive charge.  What will happen when the glass rod is brought near the balloon?

• The balloon will be attracted to the rod
• The balloon will be repelled by the rod
• The balloon will remain in place
• The balloon will spin in circles

Which part of the atom is positively charged?

• Proton
• Neutron
• Electron

The closer the charges, the ___________ the force between them

• closer
• further
• stronger
• weaker

Walking across a carpet is an example of charge being transferred by

• friction.
• induction.
• contact.
• static electricity

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

What types of charges repel?

• Positive and Positive
• Positive and Neutral
• Negative and Neutral
• Neutral and Neutral

The transfer of what type of atomic particle is responsible for the static charges on objects?

• neutrons
• protons
• electrons
• none of these

The force that pushes the electricity through a circuit is called...

• resistance
• voltage
• current
• switch

The flow of electricity through a conductor is called...

• resistance
• voltage
• current
• source of electric current