Topic 1

Question 1

electrons move around the

Answer 1

nucleus

Question 2

build up of static is caused by

Answer 2

friction

Question 3

electrons are the only things that move when there is a build up of

Answer 3

static electricity

Question 4

like charges repel,

Answer 4

opposite charges attract

Question 5

from a cloth to a polythene rod,

Answer 5

electrons move

Question 6

from an acetate rod to a cloth,

Answer 6

electrons move

Question 7

static electricity can cause

Answer 7

little sparks or shocks

Question 8

clothing crackles is

Answer 8

static electricity

Question 9

what happens in car shocks

Answer 9

your clothes rub the seats, and it discharges when you touch to car

Question 10

what happens when you touch a door knob

Answer 10

if you are walking across the carpet in slippers and touch the metal

Question 11

balloons sticking to the wall

Answer 11

are an example of induction (when there’s not even two charged objects)

Question 12

a charged comb can

Answer 12

pick up pieces of paper

Question 13

lightning is caused by

Answer 13

a build-up of static charge. The rain drops and ice bump together inside storm clouds and at the bottom it is negative, so it discharges to the ground.

Question 14

charged bike positively

Answer 14

negatively charged paint gives even layer

Question 15

similar to charged bike paint,

Answer 15

electrostatic sprayers for insecticide

Question 16

electrostatic is bad for

Answer 16

fuel filling. Could lead to a spark which might cause an explosion in a dusty or fumey place

Question 17

fuel filling problems can be solved by

Answer 17

earthing. connecting a charged object to the ground using a conductor.

Question 18

charge (Q)=

Answer 18

I (current) X t (time)

Question 19

cells and batteries supply

Answer 19

direct current

Question 20

direct current means

Answer 20

it keeps flowing in the same direction

Question 21

a direct current always runs in a ……….. on the oscilloscope

Answer 21

straight line