extra

Question 1

what do you need for a transformer work?

Answer 1

an AC supply to the primary side to create a flipping magnetic field in the core- experienced by the secondary side

Question 2

what does a step up transformer do?

Answer 2

increase the voltage decreases current the power stays the same

Question 3

What are the three conducting metals

Answer 3

Iron cobalt nickel

Question 4

What’s earthing?

Answer 4

connecting insulated objects to the Earth

Question 5

What does earth thing do?

Answer 5

makes the static charge flow away and makes the object neutral, so no sparks

Question 6

How do sparks happen?

Answer 6

work done by friction between insulators causes the transfer of electrons

If the potential difference between the charged object and earthed object is large enough electrons can jump across

Question 7

What’s motor effect ?

Answer 7

A current carrying wire in the presence of a magnetic field will experience force

Question 8

s, how do sprays work? 

Answer 8

droplets leaves nozzle of sprayer
Positive electric charge
All same charge will repel
Disperse and even coverage
object being painted as a negative charge which attracts the paint particles

Question 9

conditions to make an electricity

Answer 9

You have to use magnetic field near the flowing current