Study Jams Electric Currents

To have a complete electric circuit, the path must be _____

• small

• closed

• big

• open

An electric current is made up of _____ charged electrons

• neutral

• negative

• positive

• balanced

Current is...

• moving protons

• moving electrons

• measured in volts

• measured in ohms

Tags

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Resistance is...

• What "slows down" electrons

• What "speeds up" electrons

• Moving electrons

• What "pushes" electrons

What is needed to create an electric current?

• A magnet and a coil of wire

• Just a piece of iron

• Only a battery

• A magnet only

Tags

NGSS.MS-PS2-5

Electric ​ (a)   is the flow of electrons through a wire. It is abbreviated with ​ (b)   and is measured using the units ​ (c)   .

• current

• I

• amperes

• C

• volts

What is the best material to use for the core of an electromagnet?

• Plastic

• Wood

• Iron

• Glass

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What happens if you reverse the direction of current in an electromagnet's coil?

• The magnetic poles switch places

• The electromagnet stops working

• The electromagnet becomes a permanent magnet

• Nothing changes

Tags

NGSS.MS-PS2-5

Why are electric currents important in our daily lives?

• They create magnetic fields

• They can only be used in science experiments

• They power our electronic devices

• They are not important

What happens to the magnetic field if you increase the current in a wire?

• It disappears

• It becomes weaker

• It stays the same

• It becomes stronger

Tags

NGSS.MS-PS2-3

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