6.1-6.4 Electricity and Magnets Review

Which of the following is an electrical insulator? (a)  

• Tennis shoes
• school desk
• glass jar
• metal wire

Answer explanation

Glass is used to insulate wires need electrical post.

T/F All magnets are permanent magnets. (a)  

• True
• False

Answer explanation

Electromagnets can be create a magnetic field by turning on and off a switch.

AC generator converts:

• Mechanical energy to electrical energy

• Electrical energy to mechanical energy

• Heat energy to mechanical energy

• Chemical energy to electrical energy

Answer explanation

Generators create electricity by spinning a coil of wire inside of magnetic field.

Tags

NGSS.HS-PS3-3

Why is it not safety to shower durning a thunderstorm?

• It is safe to shower during a thunderstorm.

• The electricity could travel through the house and shock you.

• The lighting was always going to hit you, so it does not matter.

• You are not able to be shocked by lightning.

Answer explanation

You become part of the grounding circuit if your house is hit with lightning and you are in the shower.

The natural forces that are very closely related to one another is electricity and (a)   .

• Ohms
• Molecule
• Magnetism
• Atom

Answer explanation

Electricity and magnetism are closely related. Flowing electrons produce a magnetic field, and spinning magnets cause an electric current to flow. Electromagnetism is the interaction of these two important forces.

Tags

NGSS.MS-PS2-3

Current is (a)  

• moving protons
• moving electrons
• measured in volts
• measured in ohms

Answer explanation

Current is the moving of electrons. This is measured in a unit called Ampere.

If you rub a glass rod with a piece of silk, the rod becomes positively charged. This means that

• friction destroyed electrons in the rod.

• the silk has become negatively charged.

• protons have moved to the rod.

• glass attracts more protons.

Answer explanation

Which one is a series circuit?

• 
• 
• 
• 

Answer explanation

All of the other examples are a simple circuit. This ones is a series circuit because it has two loads(items) that used electricity.

What happens to the voltage in a series circuit?

• The voltage stays the same

• The voltage is added

• The voltage is reduced

• The voltage is split between the light bulbs

Answer explanation

Since there are two tings that want the electricity, the flow is split between the two objects. This is why if you have several things on one circuit it causes the lights to dim.

What is needed for current to flow? (a)  

• light bulb
• multimeter
• resistance
• voltage

Answer explanation

Voltage is the potential for electrical energy that can be used.