Gravity Transmission i – an
Force of Gravitational Attraction 𝐺𝑀1 𝑀2 Mutual Induction 𝑁𝑆 𝑉𝑆 𝐼𝑃 v–w
𝐹= = =
𝑅2 𝑁𝑃 𝑉𝑃 𝐼𝑆 -w
Gravitational Field Strength 𝐺𝑀 Power Loss (one line) 𝑃𝐿𝑂𝑆𝑆 = 𝐼 2 𝑅 p.d –
𝑔= 2
𝑅 x – f
Kepler’s Law 𝑅 3 𝐺𝑀 Mechanical Waves d – di
=
𝑇 2 4𝜋 2 Period 1 h – Pl
𝑇=
G - gravitational constant R - distance between centres of masses (m) 𝑓 - wo
M - mass (kg) g - gravity Wave Speed 𝜆 e – ch
𝑣= = 𝑓𝜆
𝑇 Quan
Electric Motors 2𝑙
Standing Wave
Torque (one side) 𝜏 = 𝑛𝑟𝐹 = 𝑛𝑟𝐼𝐵𝑙 𝜆𝑛 = De B
Wavelength 𝑛
Torque (total) 𝜏 = 𝑛𝐼𝐴𝐵 Fixed at both ends
𝑛𝑣 Mom
Standing Wave Frequency 𝑓𝑛 =
Induction Fixed at both ends 2𝑙
Wav
Magnetic Flux ∅𝐵 = 𝐵𝐴 = 𝐵𝐴 𝑐𝑜𝑠 𝜃 Standing Wave 4𝑙
𝜆𝑛 =
EMF (voltage) 𝜉 = 𝑣𝐵𝑙 Wavelength 𝑛
Fixed at one end Mom
Faraday’s Law ∆∅𝐵
𝜉 = −𝑁 𝑛𝑣 Use
∆𝑡 Standing Wave Frequency 𝑓𝑛 =
Fixed at one end 4𝑙 Forc
Direction of Induced Current Left Hand Push Rule
Lenz’s Law The magnetic field of the current in the - wavelength (m) T - period (s)
Circu
solenoid will oppose the magnetic field f – frequency (Hz) n – harmonic number
Light Waves
of the magnet v – velocity (m/s ) l – length (m)
Snell’s Law sin 𝑖 𝑣1 𝑛2 Heis
= = Prin
sin 𝑟 𝑣2 𝑛1
Critical Angle 𝑛2 -w
sin 𝑖𝑐 =
𝑛1 p–m
Diffraction 𝜆 r – ra
Flux is maximum when the
≥1
Force of Gravitational Attraction 𝐺𝑀1 𝑀2 Mutual Induction 𝑁𝑆 𝑉𝑆 𝐼𝑃 v–w
𝐹= = =
𝑅2 𝑁𝑃 𝑉𝑃 𝐼𝑆 -w
Gravitational Field Strength 𝐺𝑀 Power Loss (one line) 𝑃𝐿𝑂𝑆𝑆 = 𝐼 2 𝑅 p.d –
𝑔= 2
𝑅 x – f
Kepler’s Law 𝑅 3 𝐺𝑀 Mechanical Waves d – di
=
𝑇 2 4𝜋 2 Period 1 h – Pl
𝑇=
G - gravitational constant R - distance between centres of masses (m) 𝑓 - wo
M - mass (kg) g - gravity Wave Speed 𝜆 e – ch
𝑣= = 𝑓𝜆
𝑇 Quan
Electric Motors 2𝑙
Standing Wave
Torque (one side) 𝜏 = 𝑛𝑟𝐹 = 𝑛𝑟𝐼𝐵𝑙 𝜆𝑛 = De B
Wavelength 𝑛
Torque (total) 𝜏 = 𝑛𝐼𝐴𝐵 Fixed at both ends
𝑛𝑣 Mom
Standing Wave Frequency 𝑓𝑛 =
Induction Fixed at both ends 2𝑙
Wav
Magnetic Flux ∅𝐵 = 𝐵𝐴 = 𝐵𝐴 𝑐𝑜𝑠 𝜃 Standing Wave 4𝑙
𝜆𝑛 =
EMF (voltage) 𝜉 = 𝑣𝐵𝑙 Wavelength 𝑛
Fixed at one end Mom
Faraday’s Law ∆∅𝐵
𝜉 = −𝑁 𝑛𝑣 Use
∆𝑡 Standing Wave Frequency 𝑓𝑛 =
Fixed at one end 4𝑙 Forc
Direction of Induced Current Left Hand Push Rule
Lenz’s Law The magnetic field of the current in the - wavelength (m) T - period (s)
Circu
solenoid will oppose the magnetic field f – frequency (Hz) n – harmonic number
Light Waves
of the magnet v – velocity (m/s ) l – length (m)
Snell’s Law sin 𝑖 𝑣1 𝑛2 Heis
= = Prin
sin 𝑟 𝑣2 𝑛1
Critical Angle 𝑛2 -w
sin 𝑖𝑐 =
𝑛1 p–m
Diffraction 𝜆 r – ra
Flux is maximum when the
≥1
