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physics > Module 4 : Electricity and Magnetism > Flashcards

Module 4 : Electricity and Magnetism Flashcards

1
Q

what is charge

A

the property of particles

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2
Q

what types of charges are there (3)

A

positive
negative
neutral

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3
Q

characteristics of charged particles (2)

A

They have a electric field around them

When charge particles enter another electrical field it will experience an electrical force (Coulomb force)

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4
Q

what is the unit of charge

A

Coulomb (C)

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5
Q

what is an electrical conductor

A

a material through which electrical current flows easily

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6
Q

what is an electrical insulator

A

a material with very high resistance to the flow of electrical current

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7
Q

what is static electricity

A

imbalance of electric charges within or on the surface of a material

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8
Q

when does an electric current occurs

A

when a electric charges are moving from one place to another

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9
Q

how can materials become electrically charged (3)

A

friction
induction
contact with another charged object

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10
Q

what happens when two objects of the same charge interact

A

they repel

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11
Q

what happens when two objects of different charges interact

A

they attract

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12
Q

what are the rules with electric fields (5)

A

Electric fields exists around charged particles
Where the lines are closest the field is strongest
Field lines never cross
Lines are directed, positive to negative
Field lines are perpendicular to the surface of the charged object

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13
Q

what is electric field strength

A

the force per unit charge on a small positive test charge positioned in the field

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14
Q

what unit is electric field strength measured in

A

NC⁻¹

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15
Q

what is the equation for electrical field strength

A

E = F/q

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16
Q

what is the symbol of electric field strength

A

E

17
Q

what is the symbol of charge

A

q

18
Q

what is the symbol of force

A

F

19
Q

what the equation for electric field strength between charged plates

A

E = V/d

20
Q

what is the symbol of electric potential

A

V

21
Q

what is the symbol of plate separation

A

d

22
Q

what is the equation for electric force on a charged particle

A

F = Eq

23
Q

what are the equation for coulombs law (2)

A 
F= Kq₁q₂/r² 
F = 1/4πε₀ x q₁q₂/r²
24
Q

what does coulombs law measure

A

the force between charged particles

25
Q

what does K equal

A

K = 1/4πε₀

26
Q

what is ε₀

A

electric permittivity constant

27
Q

what is required to move a charged particle

A

Work

28
Q

what happens when charge particle moves

A

electric potential energy will change

29
Q

what is the symbol for work

A

W

30
Q

what is the equation for work (2)

A 
W = qV 
W = qEd
31
Q

what is v symbolise

A

Electrical Potential difference

32
Q

what happens when charge particles move against the field

A

electric potential energy will increase

physics (10 decks)

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