how to make an electroscope using a glass jar,pen refill,metal wire and paper clips.
Answers
Explanation:
Making a Basic Electroscope
1
Gather your materials before you begin. Having everything on hand will make it easier to do the experiment. You'll need a styrofoam cup, pencil or pen, plastic straw, tape, aluminum pie pan, string or thread, ruler, and aluminum foil.[1]
2
Use a sharp pencil to poke 2 holes on opposite sides of a styrofoam cup. Make the holes close to the bottom of the cup. They should be big enough for a straw to fit through them.[2]
3
Insert a plastic straw through the holes. Any kind of plastic drinking straw will work. It just needs to be long enough to go through both holes in the cup. Try to center the straw so that there is an equal length on either side of the cup.[3]
4
Turn the cup upside-down and tape it to the bottom of an aluminum pie pan. Tape it near the edge of the pan so 1 end of the straw is hanging off the side of the pan.[4]
Make sure you use an aluminum pan or your electroscope won’t work.
5
Cut an 8 inch (20 cm) piece of thread and tie 3 knots at one end. Use a ruler to measure the thread before you cut it. Don't worry if the thread gets a little bit shorter when you tie the knots. The knots should be close together but not touching.[5]
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6
Make an aluminum foil ball around the knots at the end of the thread. To make the ball, tear off a small piece of aluminum foil and wrap it around all 3 knots. You want the foil ball to be about the size of a marble.[6]
Wrap the aluminum foil tightly around the knots so the ball doesn’t fall off.
7
Tape the loose end of the thread to the end of the straw. You want to tape it to the end of the straw that’s hanging off the aluminum pan. When you’re done, the aluminum foil ball should hang down right next to the edge of the pan.[7]
Explanation:
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!
Extra:
Try rubbing the balloon on your hair.
Try rubbing your shoes on the carpet and then bring the electroscope close to the sole of your shoe.
Rub the vinyl with your hands.