Equations Flashcards
1
Q
Kinetic Energy
A
1/2 • mv²
2
Q
Work
A
F • Δx
Joules
3
Q
Power
A
Work / time
4
Q
Momentum
A
mass • velocity
5
Q
Coulomb’s law
A
F = k•q₁•q₂ / r²
6
Q
Electric field
A
E = k•q / r²
7
Q
Magnetic field of a wire
A
μ₀ • I
B = ——-
2πr
I = current (in Volts) μ₀ = permeability of free space
8
Q
Magnetic force (particle)
A
F = q•(v•B•sin θ)
B = magnetic field
sin θ is between the velocity and field vectors
9
Q
Magnetic force (wire)
A
F = I•(L•B•sin θ)
I = current in Volts L= perpendicular length of the wire B = magnetic field
10
Q
Torque
A
Force • radius
11
Q
Potential difference in a moving conductor
A
ΔV = v•B•L
B = magnetic field (in teslas) L = length of the conductor
12
Q
Energy of light
A
E = nhf
n - number of photons
h - Planck’s constant
f - frequency
13
Q
Wave equation
A
f = v / λ
14
Q
Circular motion of a particle in a magnetic field
A
qvB = mv²/r
Or
r = mv/qB
B - perpendicular magnetic field
