Rahil wants to make an eletroscope. Which metal out of aluminium, iron and gold he
should use to make leaf of electroscope and why?
Answers
Answer:
Materials
Clear glass jar
Jar lid or piece of plastic large enough to cover the opening of the jar
Electrical tape
Copper wire, 14g or thicker
Straw
Scissors
Glue gun
Aluminum foil or gold leaf
Vinyl record
Rubber soled shoe
Carpet
Balloon
Any other material you want to test!
STEP
Perform this experiment on a dry day! The experiment might not work if it is humid or raining. Why do you think this is important?
Use the scissors to cut a two-inch long piece of straw.
Have an adult punch a hole through the center of the jar lid or piece of plastic big enough to fit the straw through.
Insert the straw into the hole for your lid. Hot glue the straw so it is securely fastened to the lid.
Cut a 10-inch piece of copper wire.
Twist the top 4 inches into a circle or spiral to create some surface area. If we’re trying to test the presence of an electric charge, why do you think having a larger surface area better? Why is thicker wire better?
Insert the straight end of the wire through the straw and create a hook about 1 inch long.
Hang two small pieces of foil or gold leaf on the hook. Make sure they are in contact. Why do you think we’re using two pieces of metal as opposed to one? What do you think the two pieces of metal are there to do?
Place the hooked end of the metal into the jar and twist on or tape the lid to the jar.
Now it’s time to give our materials a static charge! Rub each of your materials vigorously with your hand or a piece of wool. Can you explain how this helps give each object an electric charge?
After you give each of your objects a charge, bring each object near the coiled wire on your electroscope. Be sure to record your observations!
Explanation:
