# Shared Flashcard Set

## Details

Electricity and Magnetism
n/a
56
Physics
04/13/2011

Term
 electrical potential energy
Definition
 UE = k q1 q2      r2   UE = qVE
Term
 electrical potential difference
Definition
 DVE = DUE/q   VE = kQ       r
Term
 Electrial work
Definition
 WE = qEd   DUE = - WE = -qEd
Term
 Electrial force
Definition
 FE = kq1q2          r2   FE = qE
Term
 Electrial Field strength
Definition
 E = FE /q   E = kQ/r2
Term
 ohm's law
Definition
 V = IR
Term
 Resistance
Definition
 R = r l       A   r = resisitivity l = length A = cross-sectional area
Term
 current
Definition
 I = Q/t
Term
 Series
Definition
 Current constant:   Itotal = I1 = I2 =   Potential adds up:  Vtotal = V1 + V2 +   Resistance adds up:   Rtotal  = R1  + R2  +   Kirchoff's Second law: conservation of charge
Term
 parallel
Definition
 potential is constant:  Vtotal = V1 = V2 =   Current adds up:  Itotal = I1 + I2 +   Resistance adds reciprocal:  1/Rtotal = 1/R1 + 1/R2 +   Kirchoff's 1st Law: conservation of energy
Term
 Power
Definition
 P = IV  or  P = W/t   P = I2R  or  P = V2/R
Term
 Electrical work
Definition
 W = Pt   or    W = IVt   Joule's Law   Q (W) = I2Rt
Term
 Potential difference available in a circuit
Definition
 V = Emf  -  Ir   total potential - potential lost to battery's internal resistance (r)
Term
 capcitance
Definition
 C = Q/V   C = εoA/d
Term
 Capacitors in parallel
Definition
 Ctotal = C1 + C2 +
Term
 capacitor in series
Definition
 1/Ctotal = 1/C1 + 1/C2 +
Term
 potential of capacitors
Definition
 Uc = 1/2QV   or Uc = 1/2CV2
Term
 Force on charge in magnetic field
Definition
 F = qvb sin q       F = b I l sin q
Term
 Right Hand Rules
Definition
Term
 magnetic flux
Definition
 b = f/A     b = 2kI/r
Term
 Electromotive force (Emf)
Definition
 Emf = -N Df/Dt  = -bA/t  = -blv
Term
 Charge (SU)
Definition
 q Coulombs C
Term
Definition
 r meters m
Term
 Coulomb's constant (SU)
Definition
 k 9 x 109 Nm2/C2
Term
 Potential Energy (SU)
Definition
 U Joules J
Term
 Force (SU)
Definition
 F Newtons N
Term
 Electrical field (SU)
Definition
 E Newtons/coulombs N/C
Term
 Kinetic Energy (SU)
Definition
 K Joules J
Term
 Velocity (SU)
Definition
 v meters/second m/s
Term
 Mass (SU)
Definition
 m kilogram kg
Term
 Potential Diffrence (SU)
Definition
 E volts V (J/C)
Term
 Current (SU)
Definition
 I amperes amps (C/sec)
Term
 Resistance (SU)
Definition
 R ohms Ω
Term
 Power (SU)
Definition
 P watts J/sec
Term
 Heat (SU)
Definition
 Q Joules or Calories J or cal
Term
 Work (SU)
Definition
 W wattsec J
Term
 Time (SU)
Definition
 t Seconds sec
Term
 Resistivity (SU)
Definition
 r constant
Term
 Length (SU)
Definition
 l meters m
Term
 Area (SU)
Definition
 A meters2 m2
Term
 Capacitance (SU)
Definition
Term
 Flux (SU)
Definition
 Φ Weber Wb
Term
 Magnetic Field (SU)
Definition
 b Weber/meter2 Wb/m2
Term
 Permitivity of a Vacuum (SU)
Definition
 ε0 8.85 x 10-12 C2/Nm2
Term
 Magnetic field
Definition
 β = Φ/A or 2kl/r
Term
 Force on wire moving through a magnetic field
Definition
 F = 2kLl1l2/d
Term
 Right Hand Rule in a current
Definition
 Emf = βlv Force in the direction of I, thumb. velocity, pointer finger. Magnetic field, middle, index, and pinky fingers.
Term
 Movement of charge through a magnetic field (Right Hand Rule)
Definition
 F = qvβ Direction of force, direction of palm Direction of charge and velocity, thumb magnetic field, fingers
Term
 Force in a wire carrying current in a magnetic field (Right Hand Rule)
Definition
 F = βIl direction of current, thumb Direction of force, direction of palm direction of magnetic field, fingers
Term
 Current generating magnetic field (Right Hand Rule)
Definition
 Current along wire, direction of thumb Magnetic field, wraps around wire, direction of fingers
Term
 Using Magnetic Force to find centripital force of an orbiting particle
Definition
 FB = mv2/R = qvβ
Term
 Setting the force of a charge moving through a magnetic field equal to the force of charge moving though an electric field to find velocity.
Definition
 qvβ = qE v = E/β
Term
 Finding the mass of an ion using the centripital force set equal to a charge moving though a magnetic field
Definition
 Fc = mv2/R = qvβ
Term
 Force in a current carrying a wire
Definition
 FB = ILβ If L is at an angle: FB = ILβsinΘ
Term
 Magnetic field of long straight current-carrying wire
Definition
 B = KbI/a = μ0I/2πa
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