Magnetism and Static Electricity

__________is an imbalance of electric charges within or on the surface of a material that builds up.

• static electricity
• current electricity
• circuits
• load

What is this?

• magnet
• electromagnet
• series circuit
• parallel circuit

How do you make an electromagnet stronger?

• Add a motor and/or lightbulbs
• Add more light bulbs and/or wire coils
• add more wire coils and/or a switch
• add more wire coils and/or batteries

When socks get stuck to towels in your dryer, this is an example of________________

• current electricity
• static electricity

A balloon is rubbed all over with wool.  The balloon will now attract wool because the balloon and wool

• are magnets
• have opposite charges
• have like charges
• have neutral charges

In a static discharge, which particles move from one object to another?

• protons
• neutrons
• electrons
• atoms

Which of the following could be used as the core of a simple electromagnet?

• drinking straw
• iron nail 
• a soda bottle
• an ink pen

A piece of nickel will be attracted to

• only the north pole of an electromagnet
• only the south pole of an electromagnet
• either pole of an electromagnet
• the iron core of an electromagnet

What is the purpose of an iron core in an electromagnet?

• to hold the loops of wire in place
• to make the magnetic force stronger
• to change the direction of the electric current
• to change the direction of the magnetic force

Which of these explains why the woman will be shocked when she touches the doorknob?

• She won't get shocked because the doorknob doesn't let electricity flow through it.

• She won't get shocked because static electricity doesn't exist.

• When she touches the doorknob, the buildup of electrons will flow out of her because the doorknob is a conductor that allows electrons to flow freely through it.

• When she touches the doorknob, the buildup of electrons will flow out of her because the doorknob is an insulator  that allows electrons to flow freely through it.