static electricity

Question 1

static electricity

Answer 1

occurs when there is a charge imbalance in a substance i.e. pos/neg charged

Question 2

negatively charged

Answer 2

gained electrons

Question 3

positively charged

Answer 3

lost electrons

Question 4

insulator

Answer 4

any substance through which electricity cannot flow easily

Question 5

conductor

Answer 5

any substance through which electric charge can flow

Question 6

charging by induction

Answer 6

making a neutral object charged by bringing a charged object near it and then earthing the object

Question 7

coulombs law

Answer 7

the force of attraction/repulsion between 2 point charges is directly proportional to the square of the distance between them

F∝q1q2/d²

F=1/4πε(q1q2/d²)

Question 8

permittivity

Answer 8

ε=ε⁰εr

Question 9

electric field

Answer 9

any region in space where a static charge experiences a force other than the force of gravity and which is always caused by another static charge nearby

Question 10

electric field strength

Answer 10

force per unit charge at a point in an electric field
E=F/Q
unit: NC-¹

Question 11

unit of electric field strength

Answer 11

newton per coulomb NC-¹
note: vector (must have direction)