Electricity and Magnetism

What is a circuit breaker?

• A manual switch that cuts off power to a circuit
• An automatic switch that cuts off power to a circuit when current gets too high
• An automatic switch that cuts off power to a circuit when voltage gets too high
• a broken wire in a circuit

What is voltage?

• How fast current flows around a circuit
• How much resistors resist current 
• The force that pushes current around a circuit
• The force that slows current around a circuit

What is the name of the shield created by Earth's magnetic field that surrounds and protects Earth?

• Electrosphere
• Atmosphere
• Hydrosphere
• Magnetosphere

Lightning rods are made of metal. Why aren't they made of rubber?

• Rubber is a good conductor
• Rubber is not a good conductor
• Rubber is not a good insulator
• Rubber only conducts current electricity, not static electricity

What is an electromagnet?

• a magnet that creates an electric current
• a magnet created by an electric current
• a magnet that has an electric charge
• an electric charge that is magnetic

Tags

NGSS.MS-PS2-5

What is an example of electric discharge?

• a computer hard drive
• lightning
• an electrically charged balloon sticking to a wall
• electric current flowing around a circuit

What direction do electric field lines point?

• Towards the center of an electric charge
• Away from the center of an electric charge
• From a positive charge towards a negative charge
• From a negative charge towards a positive charge

Where is Earth's magnetic North pole located?

• Near Earth's geographic North pole
• Near Earth's geographic South pole
• Directly at the same location as the geographic North pole
• Directly at the same location as the geographic South pole

What is responsible for creating Earth's magnetic poles?

• Charged particles in Earth's atmosphere
• Magnetic rocks in Earth's crust
• Earth's iron core
• The flow of ocean currents around Earth

Tags

NGSS.HS-PS2-5

What direction do magnetic field lines point?

• North to South around the magnet and South to North through the magnet
• North to South around the magnet and North to South through the magnet
• South to North around the magnet and North to South through the magnet
• South to North around the magnet and South to North through the magnet