Studied by 5 people
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C
A student rubs a plastic rod with a cloth. The rod becomes positively charged. What has happened to the rod?
It has lost electrons
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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
Note 
Flashcard (100)