S8P5b&c

Which is an example of gaining a static charge by conduction?

• Rubbing a balloon against your hair.

• Shuffling your shoes across a carpet.

• Bringing a charged rod near an electroscope.

• Touching your car on a cold day and getting a shock.

If you hold a balloon by a string and the balloon moves toward your sweater and sticks there, what would you infer?

• That the balloon and the sweater have no charges.

• That the balloon and the sweater have like charges.

• That the balloon and the sweater have neutral charges.

• That the balloon and the sweater have opposite charges.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What process is the method by which a neutral object obtains an electrical charge?

• convection

• discharge

• induction

• radiation

Friction, conduction and induction are three ways of creating a static charge on an object. Which method or methods will produce the same charge on two objects?

• Friction Only

• Conduction Only

• the neutrally charged wall.

• another negatively charged balloon.

After turning off the television, you approach it. As you get close, but not touching it, the hairs on your arm start to stand up. This is an excellent example of static charge built up by

• conduction

• convectin

• friction

• induction

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Sandy rubs a rubber rod with a piece of animal fur. The total charge of the system before rubbing is zero. The system is made up of the rubber rod and the fur. Initially, the charge on the rod is zero and it is electrically neutral. The same is true for the fur. When Sandy rubs the rubber rod with the fur, the rubber rod acquires negative (-) charges. How does the system change, overall, based on the law of conservation of charge?

• The total charge of the system is now negative rather than neutral.

• Although the rod becomes negatively charged, the piece of fur remains neutral.

• If the rod becomes negatively charged, then the fur becomes positively charged.

• Both the rod and the piece of fur have become negatively charged during the rubbing.

Tags

NGSS.HS-PS3-5

Describe how you can cause the two leaves at the bottom to repel each other and stay that way.

• Bring a positive and negative object near the top.

• Bring a negative object near the top.

• Bring a positive object near the top.

• Touch the electroscope with any charged object.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Laundry in a clothes dryer often becomes charged with static electricity while drying. Which of these best explains why a clothes dryer often generates static electricity?

• Short circuits in the dryer charge the laundry.

• Heat from the dryer charges the air and produces lightning.

• Clothes with metal pieces conduct electricity in the dryer.

• Electrons are transferred as clothes rub against each other in the dryer.

Air

• Conductor

• Insulator

Tags

NGSS.MS-PS3-4

Pencil Lead

• Conductor

• Insulator