University:
Eastern Kentucky University
Course:
PHY 201 | University Physics I
Academic year:

2021
Views:

421

Pages:

2
Author:

Ean Mason

¥ Force on electron (1) v = √[2e(vi - vf)/m] (2) F = eBvsin90 *sin90 = 1 ¥ Speed of proton v = (2eBr)/m ¥ Speed of ion v = E/B *E = volts/d ¥ Potential difference in MV KE/q *q = 2e ¥ Magnitude of B B = (µoI/2πr) + (µoI/4r) ¥ Magnitude at center B = (µoI/2πr) + (µoI/2r) ¥ Magnitude of average emf in loop E =B(Ai - Af)/Δt *Ai = πr2 ¥B loop = µoI/2r ¥B straight = µoI/2πr ¥ How much energy is lost (1) P = V2/R ¥ Speed rod should move v = IR/Bl (2) E = Pt ¥ e = 1.602176634e-19 C ¥ µo = 1.25664e-6 ¥ c = 2.99792e8 m/s ¥ B = magnetic field (T) ¥ I = current (A) ¥ Φ = magnetic flux ¥ L = inductance (H) ¥ R = resistance (Ω) ¥ E = emf (volts) ¥ 𝞈 = frequency (F) ¥XL = inductive reactance ¥ Xc = capacitive reactance ¥ Z = impedance ¥ f = frequency (rad/s or Hz) ¥ C = capacitance (F) ¥ Magnetic flux Φ = BA *A = π(d/2)2 tan-1(XL /R) or ¥ Current in circuit after time I = E/R ¥ Current in coils of motor I = E/R ¥ Current in coils at maximum speed I = (E - Eback)/R ¥ Back emf Eback = E - IR ¥ Maximum current if voltage change Imax = Vmax/XL aka Vmax/𝞈L ¥ Inductive reactance XL = VL/Io or XL = √(z2 - R2) or XL = 2πfL ¥ RMS current Irms = 𝞈CVmax/√2 *divide by √2 only if Vmax or Irms = Vrms/Xc ¥ Inductance at coil (1) z = √(R2 + XL2) (2) L = [√(z2 - R2)]/2πf ¥ Effective current of series (1) XL = 2πfL (2) XC = 1/(2πfC) (3) Z = √[(XL - XC)2 + R2] (4) I = V/Z ¥ Effective = donÕt divide by √2 ¥ Power factor cosΦ = R/Z ¥ Current in coil I = Emax/Z ¥ Phase angle sin-1(X/Z) or cos-1(R/Z) ¥ Resistance R = √(Z2 - XL2) ¥ Voltage measure across capacitor (1) R = √(Z2 - XC2) (2) VC = Emax/2πRfC ¥ Amplitude of electric field E = Bc ¥ Distance electric field is from source (1) I = Emax2/2(µoC) (2) R = √(P/4πI) 376.991 ¥ Power P = 4πIR2 ¥ Frequency of waves f = c/λ ¥ Wavelength of light λ = λgiven/n ¥ Angle of refraction 𝞱2 = sin-1(sin𝞱1/n2) ¥ What angle is light being held 𝞱2 = sin-1(sin𝞱/n2) ¥ Angle beam is not visible at 𝞱1 = sin-1 (n2/n1) ¥ Index of refraction n = a/b ¥ Angle between incident & emerging rays ¥ XL = 2πfL ¥ XC = 1/(2πfXC) ¥ n = c/v 𝞱 = ( 𝞱1 - 𝞱2 ) + ( 𝞱4 - 𝞱3 ) *µoC =