Electrical current in a metal wire involves the flow of:

• Metals

• Water

• Atoms

• Electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Which of the following are needed to light up a light globe as part of an electrical circuit?

• The circuit must be open

• There must be a difference of charge at either end of an energy source (such as a power station)

• The circuit must be closed

• The electrons in the connecting wires must be moving in random directions

What type of circuit do electrical currents flow through?

• Open circuits

• Closed circuits

• Parallel circuits

• Series circuits

In a closed circuit, where are the negatively charged electrons attracted to?

• Negative end of a battery/cell

• Neutral end of a battery/cell

• Positive end of a battery/cell

• Ground

What is the direction of electron flow in a closed circuit?

• From positive to negative

• From negative to positive

• From neutral to positive

• From ground to positive

Which of the following is NOT a common electrical conductor?

• Silver

• Gold

• Plastic

• Copper

Materials made of which element are common electrical conductors?

• Wood

• Plastic

• Metal

• Rubber

What allows the flow of electrons in one or more directions?

• Insulator

• Conductor

• Semiconductor

• Resistor

Why do the atoms of an insulator not allow electric current to flow freely?

• A. They have loosely bound electrons

• B. They have no electrons

• C. They have tightly bound electrons

• D. They have free electrons

Tags

NGSS.HS-PS1-1

Which of the following is NOT an electrical insulator?

• A. Rubber

• B. Glass

• C. Copper

• D. Diamond

Tags

NGSS.MS-PS2-3