Below are diagrams of an electroscope at rest and receiving a charge. Next to each picture is an explanation (theory) of what may be happening to the protons and electrons. Now that you have learned something about static electricity, see if you can answer the questions and give reasons that support the theory.
3.
If you take the comb away, the leaves now go back down. Why?explain the reactionin terms of electrons and protons.
Can you correctly draw the charges on the sketch?
(See e for the solution.)
4.
However, if you touch the charged comb to the loop before you take it
away, the leaves will stay apart. Study the diagram closely, and you will
see that negative charges (electrons) were added to the electroscope.
Why did electrons pass onto the loop and then down to the leaves?
Why did the leaves stay apart?
g
1.
This diagram shows an
electroscope with the same number of + and - charges.
A negatively (-) charged comb is brought near the loop (not too close). The electrons already on the loop move down to the leaves causing them to swing out.
Explain the reaction in terms of electrons and protons.
b
Which of the two rules that you discovered on page 4 explains this action?
