Magnets and Electric

Maria makes an electromagnet shown in the figure below. The battery has a voltage of 6.0V, and she uses an iron nail. Which of the following would increase the strength of the magnetic field produced?

• Doubling the number of times the wire wraps around the nail.

• Changing the battery to a 3.0V battery.

• Reversing the direction of the current flow.

• Replacing the iron nail with one made of plastic.

Tags

NGSS.MS-PS2-3

What is described as the flow of charged particles?

• electric field

• frictional force

• electric current

• gravitational force

What is described as a type of circuit in which there is only a single current path?

• short circuit

• voltage divider

• series circuit

• parallel circuit

In a copper wire, the flow of current is made up of which of the following?

• electrons

• ions

• protons

• neutrons

Tags

NGSS.HS-PS2-5

In a parallel circuit with three lights on it, one light breaks. What happens to the intensity of the other two lights?

• they go out

• they get dimmer

• they get brighter

• they stay the same

What do the lines around this magnet represent?

• North Pole
• South Pole
• Magnetic Declination
• Magnetic Field

What is responsible for the Magnetic Field around Earth?

• The Earth's crust
• The Earth's molton iron core
• The Earth's mantel
• The Sun

An electromagnet's poles may be reversed by:

• decreasing the voltage of the coil
• increasing the number of coils
• changing the direction of current flow
• altering the material used to make the coils

What kind of magnet can be turned on and off?

• refridgerator magnet
• electromagnet
• magnetite
• iron

What is most likely to happen when the switch is closed?

• A magnetic field should be produced
• The nail will rust
• The battery will explode
• The wire will catch on fire

Tags

NGSS.MS-PS2-5