Electric Forces

What is the fundamental property of matter that causes it to experience electric forces?

• magnetic charge

• gravitational charge

• atomic weight

• electric charge

What are the two types of electric charges?

• Positive and negative

• North and south

• Left and right

• Up and down

What happens when two objects with the same type of charge are brought close to each other?

• They will repel each other

• They will merge into one object

• They will explode

• They will attract each other

What is an electric field?

• The path that electricity follows through a circuit

• A type of battery used to store electricity

• A force field that surrounds electrically charged particles and exerts force on other charged particles within the field.

• A type of wire used to conduct electricity

How is the direction of an electric field defined?

• The direction of an electric field is defined by the color of the charges involved.

• The direction of an electric field is defined as the direction that a positive test charge would move if placed in the field.

• The direction of an electric field is defined by the size of the charges involved.

• The direction of an electric field is defined by the temperature of the charges involved.

What happens when you rub a positive charge (hair) with a negative charge (balloon)?

• The balloon will repel from the hair

• The hair will rise towards the balloon

• The hair's charges will electrocute the person

How does the electric force between two charges change if the distance between them is doubled?

• The electric force will remain the same.

• The electric force will decrease by a factor of 2.

• The electric force will decrease by a factor of 4.

• The electric force will increase by a factor of 2.

What is the purpose of a Van de Graaff generator?

• To generate high voltage electricity

• To create magnetic fields

• To produce heat energy

• To generate low voltage electricity

How does a Van de Graaff generator accumulate electric charge?

• Friction and transfer of electrons

• By absorbing light energy

• By conducting heat energy

• By emitting protons

What are the potential dangers of working with Van de Graaff generators?

• Loss of appetite

• Electric shock, hair standing on end, and damage to electronic devices

• Sunburn

• Broken bones