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Yr 13 Physics 07 - Electric And Magnetic Fields > Equation Recap (DNF) > Flashcards

Equation Recap (DNF) Flashcards

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1
Q

what is the equation for uniform electric field strength

A

E = V / d

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2
Q

what is the equation for general electric field strength

A

E = F / Q

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3
Q

what is the equation for the force a charged particle feels in an electric field

A

F = EQ

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4
Q

what is the equation for the acceleration of a charged particle in an electric field

A
  • F = EQ = ma

- a = EQ / m

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5
Q

what is the equation for equipotential

A

V = E(p) / Q

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6
Q

what is the equation for the kinetic energy of a charged particle in an electric field

A

E(k) =QV

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7
Q

what is the equation showing that the weight of an oil drop equals the viscous drag force it experiences

A

mg = 6 pi r n v

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8
Q

what is the equation showing that the weight of the oil drop equals the electric force

A

mg = EQ

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9
Q

what is the equation for the radial field strength at a distance r from a charge Q

A

E = Q / 4 pi e(0) r^2

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10
Q

what is the equation for the radial field potential at a distance r from a charge Q

A

V = Q / 4 pi e(0) r

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11
Q

what is the value of k = 1 / 4 pi e(0)

A

8.99x10^9

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12
Q

therefore what can the equations for radial field strength and radial field potential

A
  • E = kQ / r^2

- V = kQ / r

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13
Q

what is the equation for coulombs law

A
  • F = Q1Q2 / 4pi e(0) r^2

- F = kQ1Q2/ r^2

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14
Q

in the charged pair of balloons setup, what is the equation for F(e) in terms of T

A

F(e) = T sin0

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15
Q

in the charged pair of balloons setup, what is the equation for weight (mg) in terms of T

A

mg = T cos0

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16
Q

in the charged pair of balloons setup, what does mgd / L equate to

A
  • mgd / L = F

- mgd / L = kQ1Q2 / r^2

17
Q

what is the equation for capacitance

A

C = Q / V

18
Q

what is the equation for energy stored in a capacitor

A

E = QV / 2

19
Q

what are the two equation for energy stored in a capacitor in terms of C

A
  • E = CV^2 / 2

- E = Q^2 / 2C

20
Q

what is the equation for the discharge of charge across a capacitor overtime

A

Q(t) = Q(0) * e^-t / CR

21
Q

what is the equation for the discharge of current across a capacitor overtime

A

I(t) = I(0) * e^-t / CR

22
Q

what is the equation for the discharge of pd across a capacitor overtime

A

V(t) = V(0) * e^-t / CR

23
Q

what is the equation for the time constant of a capacitor

A

T = CR

24
Q

what is the equation for the charging of current across a capacitor overtime

A

I(t) = I(0) * e^-t / CR

25
Q

what is the equation for the charging of charge across a capacitor overtime

A

Q(t) = Q(0) * (1 - e^-t / CR)

26
Q

what is the equation for the charging of pd across a capacitor overtime

A

V(t) = V(0) * (1 - e^-t / CR)

27
Q

what is the equation for magnetic flux, taking components into consideration

A

(Io) = BA sin0

28
Q

what is the equation for magnetic flux linkage, taking components into consideration

A

flux linkage = NBA sin0

29
Q

what is the equation for the strength of a force on a wire which has current, whilst in a magnetic field, taking components into consideration

A

F = BIL sin0

30
Q

by the way, what do i mean by taking components into consideration and why do i use sin0

A
  • the component perpendicular to the field

- sin0 is used when 0 is the (smallest) angle between the wire and the field lines

31
Q

what is the equation for the strength of a force on a charged particle moving across a magnetic field, considering components

A

F = BQv sin0

32
Q

what is the equation for centripetal force

A

F = mv^2 / r

33
Q

what is the equation for induced emf

A

emf = - delta NBA / delta t

34
Q

what is the equation for frequency in terms of time period

A

f = 1 / T

35
Q

what are the equations for the root-mean-square value of pd and current

A
  • V(rms) = V(0) / root 2

- I(rms) = I(0) / root 2

36
Q

what is the equation for the relationship between the number of turns of wire and the pd across the primary and secondary coil

A

Vp / Vs = Np / Ns

37
Q

what is the equation for the radius a charged particle is travelling, not using force as a variable

A

r = mv / BQ

Yr 13 Physics 07 - Electric And Magnetic Fields (14 decks)

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