Electrostatic/magnetic/dynamic formulas
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| What is the formula for the electrostatic force between 2 charges q1 and q2 separated by a distance r | F = k(q1)(q2)/(r^2)
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| What is the formula for the force felt by a positive test charge (q) when brought into an electric field of strength E | F = qE
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| What is the electric field (E) at a distance r away from a point charge Q? | E = KQ/r^2
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| What is the formula for the electric potential (V) due to a source charge Q at a distance r from the source charge? | V = KQ/r
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| What is the formula for the potential difference (V) in measuring the work done to move a charge q against an electric field? | V = work/q
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| What is the formula for the electric potential energy between 2 charges q1 and q2, initially at an infinite distance apart, to a separation distance of r? | U = K(q1)(q2)/r
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| The electric field (E) between 2 plates d units apart with a voltage (V) across the plates is? | E = V/d
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| A parallel plate capacitor has a capacitance (C), expressed in terms of area (A) and distance apart (d) of? | C = (permittivity)*A/d
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| The electric energy (U) stored in a capacitor is? | U = 1/2 CV^2 or (1/2)QV
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| Capacitors in parallel? | C = C1 + C2 + ...
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| Capacitors in series? | 1/C = 1/C1 + 1/C2 + ...
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| How does the electric field and charge quantitiy change when a dielectric is added to a capacitor? | E is decreased, but the amount of charge is increased.
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| The resistance (R) of a wire is dependent upon the resistivity (rho), the length (l) and the cross-sectional area (A) as? | R = rho(l)/A
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| Ohm's Law | V = IR
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| Resistors in series? | R = R1 + R2 + ...
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| Resistors in parallel? | 1/R = 1/R1 + 1/R2 + ...
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| Units of magnetic field? | Tesla
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| How does B vary with current and the distance from the current-carrying wire? | B=kI/r
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| Force on a length L of a current (I)-carrying wire in a magnetic field B? | F = ILBsin(theta)
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| Force on a charged (q) particle moving with velocity (v) through a magnetic field (B)? | F = qvBsin(theta)
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| Undeflected motion of a particle through a magnetic field? | r = mv/qB
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| Lorentz force (sum of electric and magnetic forces)? | qE = qvB or E=vB
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| Faraday's Law | induced emf = change in flux/change in time
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| Magnetic flux | = BA sin (theta) or Q(enclosed)/permittivity
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| Induced current (I) | =-Blv/R
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| Intensity of a sound wave= | power/area
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| Transformer rule | Vp/Np=Vs/Ns or Power in primary side=Power in secondary side
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| Velocity of sound wave= | freq * wavelength
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| Doppler Effect= | app freq = freq (v + vo)/(v - vs)
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| Snell's Law | n1*sin(theta1) = n2*sin(theta2)
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