electrical charges and fields

Question 1

what charge does a proton have?

Answer 1

positive

Question 2

what charge does an electron have?

Answer 2

negative

Question 3

what charge does a neutron have?

Answer 3

it is uncharged

Question 4

what is the charge if an atom loses an electron?

Answer 4

positive

Question 5

what is the charge if an atom gains an electron?

Answer 5

negative

Question 6

what are charged atoms called?

Answer 6

ions

Question 7

what happens when a polythene rod is rubbed with a dry cloth?

Answer 7

the dry cloth ransfers electrons to the surface atoms of the rod on to the cloth. so the polythene rod becomes negatively charged and the dry cloth becomes positively charged

Question 8

what about when you rub a perspex rod with a dry cloth?

Answer 8

electrons transfer from the dry cloth to the surface atoms on the rod. perspex rod becomes positively charged. positive charge = to negative charge on dry cloth

Question 9

what type of force will a charged object experience from another charged object?

Answer 9

a non-contact force

Question 10

opposite charges attract…

eg. negatively charged rod brought close to positively charged rod = them pulling together (attraction)

Answer 10

like charges repel.

eg negatively charged plastic rod is brought near to another negatively charged rod = them moving appart (repulsion)

Question 11

what is an electric field?

Answer 11

a region where charges experience a force

Question 12

what does the direction of arrows representing fields show?

Answer 12

the way a POSITIVE charge will be pushed. field lines point away from positive charges and towards negative charges.

Question 13

what does it mean if the arrows are closer together?

Answer 13

the stronger the field and the greater the force experienced by charges in that field. This means that the field is stronger closer to the object.