Electricity and Magnetism

What object could be used to test the strength or capability of an electromagnet?

• a piece of paper

• a paper clip

• sand

• a battery

Tags

NGSS.MS-PS2-3

In which kind of materials is charge MOST easily transferred?

• insulators

• conductors

• semiconductors

• non-conductors

What is an automatic switch that opens (like the picture shows) when the current reaches a set value?

• surge suppressor

• circuit breaker

• relay

• fuse

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

• protons

• ions

• neutrons

• electrons

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

When using multiple power sources at the same time, which best describes how you can turn off one without cutting all the others off as well?

• The circuits are wired in series, and when one appliance turns off, the others can still run.

• The circuits are wired in series. and when one appliance turns off, the others will switch to parallel circuits for power.

• The circuits are wired in parallel, and when one appliance turns off, the others can still run.

• The circuits are wired in series, and when one appliance turns off, the others can still run.

Two magnets, shown here, are placed near each other on a table. What will happen to the magnets?

• they will glow

• they will repel

• they will attract

• they will melt

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What is described as the flow of charged particles?

• frictional force

• electric field

• gravitational force

• electric current

What happens to the current flowing through a circuit as resistance increases?

• it decreases

• it increases

• it stays constant

• it changes direction

Jose makes two electromagnets, as shown in the diagram: Which of the following statements about the magnetic field created by the two electromagnets is correct?

• The two batteries will produce the same magnetic field strength.

• The 1.5 volt battery will produce a magnetic field that is 36 times as strong as the 9 volt battery.

• The 9 volt battery will create a magnetic field that is 6 times as strong as the 1.5 volt battery.

• The 1.5 volt battery will produce a magnetic field that is 6 times as strong as the 9 volt battery.

Tags

NGSS.MS-PS2-3

Which statements BEST explains why batteries must be facing the correct direction in a flashlight for the flashlight to turn on?

• Batteries in a flashlight produce direct current (DC) so the charge only flows one way.

• Batteries in a flashlight produce alternating current (AC) so the charge only flows one way.

• Batteries in a flashlight produce direct current (DC) so the flow of charge changes direction periodically.

• Batteries in a flashlight produce alternating current (AC) so the flow of charge changes direction periodically.