Activity of an electroscope? Must include aim,material requires,procedure,observation,conclusion
Answers
Answer:
Have you ever tried to shut the car door on a warm, dry day and experienced a small shock of electricity? How about rubbing your shoes along a carpeted floor to shock your friends or family members? Have you made your hair stand up by rubbing it with a balloon?
You’re able to do all of these things because of static electricity—a build-up of an electric charge on a surface. Static electricity can be caused by bringing two materials together or separating them. The shock released when the charged surface touches something else is caused by electrons leaping across to the surface without a charge. Let's learn how to build a homemade electroscope so that we can see this in action!
ELECTROSCOPE;
Aim- An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it.
Material- Modern electroscopes usually use balls made of plastic. In order to test the presence of a charge on an object, the object is brought near to the uncharged pith ball.
Procedure-
- 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!
Observation- Bringing a positively charged rod close to the top of the electroscope means electrons are attracted from the arms of the electroscope to the top. ... Thus, a charged electroscope can distinguish between positively charged objects and negatively charged objects.
Conclusion- The leaves not only acquire the charge but retain it. The electroscope is "charged." Left, Bring a positive charge near the electroscope, then touch the ball with your finger. Right, The charge goes up into the ball after the charged body is removed.