Make A Circuit, Break A Circuit

What makes an electromagnet stronger?

• Increase the number of wire wraps around the iron core
• decrease the strength of the power source
• remove the source of current
• lightning bolts hitting a tree

What is the relationship between electrical current and magnetic field strength in an electromagnet?

• When current is increased, magnetic field strength increases
• When current is increased the strength of magnetic field decreases

This is a picture of a simple electromagnet. How can the electromagnet be made stronger?

• Add more coils of wire to the nail.
• Use a smaller battery.
• Reverse the poles of the magnet.
• Remove all the coils and the nail.

Tags

NGSS.MS-PS2-3

How are electromagnets different from magnets?

• magnets can be turned on/off
• you can turn an electromagnet on/off
• magnets are more powerful
• magnets have a North and South pole

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Surrounding every magnet is a __________  __________.

• magnetic field
• force field
• electromagnet
• electromagnetic pulse

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is the job of the generator in a coal power plant?

• Use electrical energy to turn a turbine.
• Convert electrical energy into mechanical energy
• Turn the turbine which changes water into steam
• To change mechanical energy into electrical energy

Mrs. Goodwyn's students are complaining that it is hot in the classroom. She plugs in the fan and turns it on, which energy transformation occurs?

• mechanical to electrical
• electrical to mechanical
• chemical to mechanical
• electromagnetic to mechanical

This produces electrical energy when an electromagnet is rotated between magnets.

• Generator
• Motor
• Electromagnet
• Circuit

Which of the following may be done to increase the force felt during the motor effect?

• Increase the current, length of wire in the field or the strength of the magnetic 
• Increase the voltage, length of wire in the field or the strength of the magnetic 
• Increase the current, increase the voltage or increase the strength of the magnetic field
• Increase the resistance in the wire or increase the magnetic field strength

What should the blanks be?
When a wire carrying an electric current is placed in a ________________, it may experience a force. The field from the fixed magnet ___________ with the field due to the current. This can cause the wire to be attracted or repelled from the fixed magnet you will see the effect of the attraction/repulsion in  the ___________of the wire.

• magnetic field, interacts, movement
• electric field, interacts, movement
• magnetic field, interacts, vibration
• circuit, interacts, movement