Electrostatics

Question 1

name the particles in an atom

Answer 1

proton- positive, neutrons- neutral, electrons-negative

Question 2

name the locations of the 3 different particles in an atom

Answer 2

protons- nucleus, neutrons- nucleus, electrons- orbiting

Question 3

The charge of each particle in an atom

Answer 3

• protons = +1
• neutrons = 0
• electrons = -1

Question 4

Describe the mass of each particle in an atom

Answer 4

• protons - +1
• neutrons - +1
• electrons - 1/2000

Question 5

What is the atom mostly?

Answer 5

Empty space

Question 6

Explain how Rutherford’s experiment shows us that an atom is mainly empty space

Answer 6

most of the alpha particles went straight through the foil which shows us its mostly empty space

Question 7

Explain how Rutherford’s experiment shows us the centre of the atom is empty space

Answer 7

1 in 1000 bounced back which shows us most of the mass of the atom is at the centre (nucleus)

Question 8

Describe how objects become charged

Answer 8

If objects are rubbed together then the electrons transfer to the other object

Question 9

why do objects become positively charged?

Answer 9

they have less electrons

Question 10

why do objects become negatively charged?

Answer 10

they have more electrons

Question 11

What are the dangers of electrostatics?

Answer 11

could cause electric shocks, this could cause burns or even stop your heart.

Question 12

what are 3 uses for electrostatics?

Answer 12

Use any 3 of these:

paint sprayers, photo copiers, smoke precipitators, lightening rods, inkjet printers, earthing cables

Question 13

how do electrostatics work?

Answer 13

they pull or push on objects without touching them. Rubbing some materials together can result in something called ‘charge’ being moved from one surface to the other.

Question 14

What are the uses of smoke precipitators?

Answer 14

• smoke passes through wire grid =charged
• attracted to oppositely charged plates
• plates turn off
• panged together= get rid of soot

Question 15

What are the uses/ dangers or earthing cables?

Answer 15

• aeroplanes and tankers become charged bc of friction in air
• cable allows electron to flow to ground
• this prevents sparks that could cause fires/ explosions

Question 16

To avoid a shock what do you do with the earthing cable?

Answer 16

• use rod to press electrons safely to ground

Question 17

Uses of paint sprayers are?

Answer 17

• Nozzle charges paint oppositely yo the charge of bike
• Paint is then attracted to bike
• so then paint u just sprayed on bike repells from the paint in can
• creates even coat

Question 18

What do the electrostatics run through as a result of using earthing cables?

Answer 18

Earthing cables work when you connect the cable to the ground

Question 19

Approximately how many volts would you need to create a spare 5cm long in air?

Answer 19

150,000

Question 20

What is a spark?

Answer 20

A huge electrical discharge

Question 21

If two objects are put close to each other and they have the same charge, what do you see?

Answer 21

That they repell

Question 22

If you put two objects with different charges next to each other, what happens?

Answer 22

They attract

Question 23

If a comb with a positive charge is heald above some negatively charged peices of paper what is likely to happen?

Answer 23

They attract to each other and so the comb picks ip the pieces of paper 📃

Question 24

Give examples of insulators

Answer 24

• Plastic
• Glass
• Rubber
• Wood

Question 25

Give examples of conductors

Answer 25

• Silver
• Copper
• Aluminium
• Iron

Question 26

What can transfer from one object to the other (what charge)

Answer 26

Electrons

Question 27

Why can only electrons travel from one object to another?

Answer 27

Because they orbit the nucleus