sp 12-13

Question 1

uses of static electricity

Answer 1

photocopiers - copy images onto a charged plate before printing them.
electrostatic sprayers e.g insecticide sprayers + paint sprayers

Question 2

dangers of static electricity

Answer 2

refuelling cars - as fuel flows out into aircraft, static can build up, can lead to a spark > explosion
airplanes- as planes fly through the air, friction between air and plane cause plane to become charged
lightning - raindrops and ice bump together inside storm clouds, leaving the top of the cloud positively charged and the bottom negative. creates huge voltage and big spark

Question 3

what is earthing

Answer 3

connecting a charged object to the ground using a conductor, provides easy route for static charge to travel into ground

Question 4

electric field

Answer 4

a force around a charge where another charge experiences a force

Question 5

what are the three magnetic materials

Answer 5

iron, nickel and cobalt

Question 6

permanent magnet

Answer 6

produce their own magnetic field all the time

Question 7

induced magnets

Answer 7

only produce a magnetic field when they’re in another magnetic field

Question 8

motor effec

Answer 8

a current in a magnetic field experiences a force

Question 9

solenoid

Answer 9

long coil of wire

Question 10

electromagnet

Answer 10

a magnet with a magnetic field that can be turned on and off using an electric current

Question 11

electromagnetic induction

Answer 11

induction of a potential difference in a wire which is experiencing a change in magnetic field