Attract and Repel

Day 1 - Electrically Charged Objects

SC.5.P.10.3 Investigate and explain that an electrically charged object can attract an uncharged object and can either attract or repel another charged object without any contact between the objects.​

Multiple Choice

After emptying a load of laundry from the dryer, a student observes that all of the socks are sticking to other pieces of clothes. When he pulls them apart, he hears a crackling sound, and sometimes feels tiny shocks where he touches the clothes. Which of these ideas is MOST LIKELY the cause for the socks sticking to the other clothes?

• magnetism

• gravity

• static

• glue

​Electrically Charged Objects

I. Electrical energy and magnetic force are connected.

• Magnets have poles that attract and repel.

• Electrical energy has a positive or a negative charge.

  • When objects become electrically charged, they can attract or repel other objects, in the same way that magnets can attract or repel other magnetic objects.​

Multiple Choice

Magnets have poles __________________.

• that attract

• that repel

• that attract and repel

• that stand straight up

Multiple Choice

When objects become _______________, they can attract or repel other objects

• negatively charged

• smaller

• larger

• electrically charged

​II. An attraction is a pull.

• When two objects are attracted, they are pulled together.

  • A magnet and an iron nail are magnetically attracted: they will be pulled together.

• Objects that are electrically charged can attract other objects.

​Have you ever taken something out of the dryer, and another piece of clothing stuck to it? For example, often socks will stick to other pieces of clothing. The socks have become electrically charged when in the dryer, and will stick to other pieces of clothing. This is called electrostatic charge. In laundry, we call it static cling: the static (electrostatic) charge of the sock causes it to cling (be attracted to) something else.

Multiple Choice

An attraction is _______________.

• circuit

• magnet

• a push

• a pull

Multiple Choice

Objects that are electrically charged can __________ other objects.

• charge

• attract

• get rid of

• find

​You can see the same static cling when you rub an inflated balloon in your hair. The balloon becomes charged because of the rubbing (same way the sock became charged in the dryer, rubbing against all the other clothes.) After you rub a balloon in your hair, it will stick to your hair, the wall, other objects... The electrical charge of the balloon causes it to be attracted to other objects.

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Multiple Choice

a buildup of electric charges on an object

• static electricity

• electric force

• electrical circuit

• electric discharge

Multiple Choice

a push or pull between two charged objects

• electric force

• electrical circuit

• static electricity

• electric discharge

Multiple Choice

How can it be explained that someone's hair can stick to a balloon?

• There is electricity.

• There is too much dust in the air.

• The person needs to wash his hair.

Multiple Choice

Will the balloons ATTRACT or REPEL each other?

Multiple Choice

Will the balloons ATTRACT or REPEL each other?

Multiple Choice

Will the balloons ATTRACT or REPEL each other?

​In this video, notice that the stream of water is bending away from the pvc pipe. This is evidence that the water is being repelled, or pushed away from the pipe. The pipe and the water both have electrical charges, and just like two magnets, these two charged objects are repelled.

Multiple Choice

Choose the correct answer.

• Attract

• Repel

Multiple Choice

Choose the correct answer.

• Attract

• Repel

Multiple Choice

Ms Jo Jo rubbed two balloons with a piece of wool. What will happen when the balloons are brought near each other?

• The balloons will repel each other.
• The balloons will attract each other.
• The balloons will become positively (+) charged.
• The balloons will pop.

Multiple Choice

If the two charges represented in the figure were brought near each other, they would

• attract each other.
• repel each other.
• cause static discharge.
• have no affect on each other