Static Electricity Workbook

^^…^^

C

2. ^^**A student rubs a plastic rod with a cloth. The rod becomes positively charged. What has
happened to the rod?**^^

It has lost electrons

^^…^^

B

==__**II. Complete the following statement.**__==

%%An atom is electrically……….. To make an atom charged, ………… have to be added or removed. Unlike charges…………. and ………… charges repel.%%

neutral, electron, attract, like

==**What charge do each of the following have?
a) **__**Proton**__==

Positive

==**What charge do each of the following have?**==

==**b)** __**Neutron**__==

No charge

==**What charge do each of the following have?**==

==**c)** __**Electron**__==

Negative

==**Ball Q**==

negative

==**Ball R**==

Positive

%%**(ii) Explain your answer for part (i) for the charge on ball Q.**%%

Ball Q is repelled by the negative charge on ball P. So Q has the same charge as on P

==**The rod becomes negatively charged because………..move from the…….. to the rod.**==

Electrons, cloth

%%(ii) The student moves the rod close to a suspended, charged rod. The two rods repel each other. State the type of charge on the suspended rod.%%

negative

==**(iii) Explain your answer to (a)(ii).**==

Like charges repel each other

==**(b) A device has a metal case. Any charge on the case must be able to move to earth.
(i) Draw one ring around a material that is suitable for the connection to earth.**==

Copper

%%(ii) Explain your answer to (b)(i).%%

Copper is a good conductor of charge