Electricity & Magnetism

What is static electricity?

• a buildup of electric charge on something

• a repelling between electrons

• an electric circuit

• a flow of protons

Tags

NGSS.MS-PS2-3

If a copper wire is attached to the positive and negative ends of the battery, what will be the effect?

• an electrostatic discharge

• an electric current

• a power source

• static electricity

Tags

NGSS.MS-PS2-3

The illustration shows an electric circuit consisting of a battery and three light bulbs.   

What type of circuit is shown in the diagram?

• series circuit

• parallel circuit

• double circuit

• open circuit

The picture shows a device made of a battery, a nail, and a long piece of copper wire.  It converts electrical energy into a different form of energy.   

Which term describes the device in the illustration?

• electric generator

• electric motor

• electromagnet

• electric switch

Hector rubs a comb with a wool cloth.  Next, he holds the comb near, but not touching, some bits of paper. 

Which of the following is most likely to happen?

• A spark jumps between the paper bits and the comb.

• The paper bits move away from the comb.

• The paper bits are not attracted to the comb.

• The paper bits are attracted to the comb and stick to it.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What happens when an object with a negative charge comes near another object with a negative charge?  

• The objects neither repel nor attract each other.

• The objects both gain electric charges.

• The two objects attract each other.

• The objects repel each other.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Curtis uses a wool cloth to give a balloon a negative charge.  What will happen if he holds the balloon near the wall, and why?  

• The balloon will not stick to the wall because the negatively charged balloon is repelled by the negatively charged wall.

• The balloon will stick to the wall because a negatively charged object is attracted to the negatively charged wall.

• The balloon will stick to the wall beacuse the negatively charged balloon is attracted to the uncharged wall. (It pushes the negatives away and is attracted to the positives)

Tags

NGSS.MS-PS2-3

What happens when the north and south poles of different magnets get close to each other?  

• nothing

• They repel each other.

• They attract each other.

Tags

NGSS.3-PS2-3

Which is not an advantage of electromagnets over permanent magnets?  

• Electromagnets can be built as big as necessary.

• Electromagnets are found in nature.

• The strength of an electromagnet can be controlled by the amount of current.

• Electromagnets can be turned on and off.

Tags

NGSS.MS-PS2-3

What is the purpose of the battery in the circuit?  

• to slow the flow of electricity

• to be a power source

• to connect the components

• to use electric current