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IGCSE STUDYING > physics all equations > Flashcards

physics all equations Flashcards

1
Q

word equation for voltage (multiplication)

A

Voltage (V) = current (A) Γ— resistance (Ξ©)

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2
Q

whats the symbol equation for current

A

𝐼 = Q/T

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3
Q

what the word equation for current

A

Current (A) =
charge (C)
time (s)

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4
Q

Symbol equation for avarage orbital speed

A

𝑣 = 2πœ‹π‘Ÿ/𝑇

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5
Q

word equation for average orbital speed

A

π΄π‘£π‘’π‘Ÿπ‘Žπ‘”π‘’ π‘œπ‘Ÿπ‘π‘–π‘‘π‘Žπ‘™ 𝑠𝑝𝑒𝑒𝑑 (msβˆ’1) =2 Γ— πœ‹ Γ— average radius of the orbit (m)
orbital period (s)

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6
Q

symbol equation for gamma radiation

A

Gamma 𝑍𝑋
𝐴 β†’ π‘π‘Œ
𝐴 + 𝛾

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7
Q

symbol equation for beta radiation

A

Beta: 𝑍𝑋𝐴 β†’ 𝑍+1π‘Œπ΄ + βˆ’1𝑒0

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8
Q

Symbol equation for alpha radiaition

A

Alpha: 𝑍𝑋𝐴 β†’ π‘βˆ’2π‘Œπ΄βˆ’4 + 2𝐻𝑒 4

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9
Q

word equation for voltage and current in transformers

A

Transformers:
voltage in the secondary coil (V)
voltage in primary coil (V)
=
current in the secondary coil (A)
current in primary coil (A)

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10
Q

symbol equation for voltage and current in transformers

A

𝑉𝑠/𝑉𝑝=𝐼𝑠/𝐼𝑝

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11
Q

word equation for voltage and turns of coil in transformers

A

Transformers:
voltage in the secondary coil (V)
voltage in primary coil (V)
=
turns on the secondary coil
turns on the primary coil

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12
Q

symbol equation for voltage and turns of coil in transformers

A

𝑉𝑠/𝑉𝑝=𝑁𝑠/𝑁𝑝

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13
Q

word equation for resistance (length)

A

Resistance (Ξ©) =
resistivity (Ξ©m) Γ— length (m)
π‘Žπ‘Ÿπ‘’π‘Ž(m2)
Wires have a circular cross section, area = Ο€ Γ— radius2

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14
Q

Symbol equation

A

𝑅= 𝜌 𝑙
β€”β€”β€”
𝐴

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15
Q

symbol equation for resistors in a parallel

A

π‘…π‘‘π‘œπ‘‘π‘Žπ‘™= 1/𝑅1+1/𝑅2+1/𝑅𝑛3

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16
Q

energy transferred equation (power)

A

Energy transferred (J) = power (W) Γ— time (s) W = Pt

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17
Q

equation for resistors in series

A

Resistors in series: Total Resistance (Ξ©) = sum of individual resistors (Ξ©) Rtotal = R1+R2+R3+…Rn

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18
Q

word equation for energy transferred (current)

A

Energy transferred (J) = current (A) Γ— voltage (V) Γ— time (s)

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19
Q

symbol equation for energy transferred (current)

A

W = IVt

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20
Q

word equation for voltage(division)

A

Voltage (V) =energy transferred (J)
/charge (C)

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21
Q

symbol equation for voltage(division)

A

𝑉 =π‘Š/𝑄

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22
Q

symbol equation for power (resistance)

A

P = I times 2R

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23
Q

word equation for power (resistance)

A

Power (W) = current2 (A) Γ— resistance (Ξ©)

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24
Q

word equation for power(voltage)

A

Power (W) = current (A) Γ— voltage (V)

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25
Q

symbol equation for power (voltage)

A

P = IV

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26
Q

symbol equation for voltage (multiplication)

A

V = IR

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27
Q

Symbol equation for current

A

𝐼 =𝑄
/t

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28
Q

word equation for current

A

Current (A) =charge (C)
/time (s)

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29
Q

word equation for refractive index (critical angle)

A

Refractive index =1
sine of critical angle

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30
Q

acceleration word equation

A

acceleration (msβˆ’2) =final velocity (msβˆ’1) βˆ’ initial velocity(msβˆ’1)
/time (s)

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31
Q

acceleration symbol equation

A

π‘Ž =𝑣 βˆ’ 𝑒
/𝑑

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32
Q

word equation for weight

A

Weight (N) = mass (kg) Γ— gravitational field strength (ms-2)

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33
Q

symbol equation for weight

A

W = mg

34
Q

what is the gravitational field strength of the earth

A

Earth’s gravitational field strength = 9.8 ms-2 (as of 2023)

35
Q

word equation for force

A

Force (N) = mass (kg) Γ— acceleration (ms-2)

36
Q

symbol equation for force

A

F = ma

37
Q

word equation for density

A

Density (kgmβˆ’3) =mass (kg)
/volume 3

38
Q

symbol equation for density

A

𝜌 =π‘š/𝑉

39
Q

Hookes law symbol equation

A

Hooke’s law: Force (N) = constant (Nm-1) Γ— extension (m)

40
Q

Hookes law symbol equation

A

F = kx

41
Q

pressure word equation (land)

A

Pressure(Pa) =Force (N)
/area (m2)

42
Q

pressure symbol equation (land)

A

𝑃 =𝐹
/𝐴

43
Q

Fluid pressure symbol equation

A

Fluid Pressure (Pa) = density (kgm-3) Γ— gravitational field strength (ms-2 or Nkg-1) Γ—
height (m)

44
Q

fluid pressure symbol equation

A

𝑃 = πœŒπ‘”β„Ž

45
Q

word equation for work

A

Work (J) = force (N) Γ— distance moved (m)

46
Q

symbol equation for work

A

W = Fd

47
Q

symbol equation for power (division)

A

𝑃 =π‘Š
/ 𝑑

48
Q

word equation for power (division)

A

Power (W) =work (J)
/time (s)

49
Q

word equation for kinetic energy

A

Kinetic Energy (J) = Β½ Γ— mass (kg) Γ— velocity2 (ms-1)

50
Q

symbol equation for kinetic energy

A

KE = Β½mv2

51
Q

word equation for potential energy

A

Gravitational potential energy (J) = mass (kg) Γ— gravitational field strength (ms-2 or
Nkg-1) Γ— height (m)

52
Q

symbol equation for GPE

A

GPE = mgh

53
Q

word equation for efficiency

A

Efficiency (%) =
useful power output (W or J)
total power input (W or J)
Γ— 100%

54
Q

symbol equation for effciency

A

πœ‚ =π‘ƒπ‘œπ‘’π‘‘
Γ— 100%
/𝑃𝑖𝑛

55
Q

word equation for a moment

A

Moment (Nm) = Force (N) Γ— perpendicular distance from pivot (m)

56
Q

symbol equation for a moment

A

M = Fd

57
Q

word equation of the sum of clockwise and anticlockwise moments

A

Sum of clockwise moments (Nm) = sum of anticlockwise moments (Nm)

58
Q

symbol equation of the sum of clockwise and anticlockwise moments

A

F1d1 = F2d2

59
Q

word equation for momentum

A

Momentum (kgms-1) = mass (kg) Γ— velocity (ms-1)

60
Q

symbol equation for momentum

A

p = mv

61
Q

word equation

A

Impulsive Force (N) =
change in momentum (kgmsβˆ’1)
time (s)

62
Q

symbol equation

A

𝐹 =π›₯𝑝
𝑑

63
Q

word equation for impusle

A

Impulse (kgms-1 or Ns) = change in momentum (kgms-1)

64
Q

symbol equation for impusle

A

π›₯𝑝 = π‘šπ‘£ βˆ’ π‘šπ‘’

65
Q

word equation for Boyle’s Law

A

Boyle’s Law for changes in gas pressure at constant temperature :
pressure1 (Pa) Γ— volume1 (m3) = pressure2 (Pa)Γ— volume2 (m3)

66
Q

symbol equation for Boyle’s Law

A

P1V1 = P2V2

67
Q

word equation for specific heat capacity ( not in the form to find the specific heat capacity

A

Energy (J) = mass (kg) Γ— specific heat capacity (Jkg-1Β°C-1) Γ— temperature change (Β°C)

68
Q

symbol equation for specific heat capacity ( not in the form to find specific heat capacity

A

Q = mcΞΈ

69
Q

word equation for wave speed

A

Wave speed (ms-1) = frequency (Hz) Γ— wavelength (m)

70
Q

symbol equation for wave speed

A

V = fΞ»

71
Q

word equation for frenquency

A

Frequency (Hz) =1
/Period (s)

72
Q

symbol equation for frenquency

A

𝐹 =1
/𝑇

73
Q

word equation for Refractive index angles

A

Refractive index =sine of the angle of incidence, i
sine of the angle of refraction, r

74
Q

symbol equation for refractive index angles

A

𝑛 =𝑠𝑖𝑛 𝑖
𝑠𝑖𝑛 π‘Ÿ

75
Q

word equation for refractive index (light speed)

A

Refractive index =speed of light in vacuum
speed of light in material

76
Q

symbol equation for refractive index (light speed)

A

𝑛 =𝑐
/𝑣

77
Q

symbol equation for refractive index (critical angle)

A

𝑛 =1
𝑠𝑖𝑛 οΏ½

78
Q

word equation for average velocity

A

Average velocity (msβˆ’1) =displacement (m)
/time (s)

79
Q

word equation for average speed

A

Average speed (msβˆ’1) =distance (m)
/time (s)

80
Q

symbol equation for average speed

A

𝑠 =𝑑
/𝑑

81
Q

symbol equation for average velocity

A

𝑣 =π‘₯
/𝑑

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