Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

phyx eqns E & M

Electric Field (two) E = F / q or E = k Q / r^2 q= point charge
Electric Potential Energy U = q V or W = q V V= Electric Potential
Average Electric Field E = -V/r
Capacitance C = Q/V Q= Charge
Capacitance with Area C = εo A/ r εo = vacuum permittivity constant
Electric Potential V = k Q / r
Electric Charge Q= CV
Energy Stored in a Capacitor (two) U = 1/2 QV or U = 1/2 CV^2
Resistance R = pl/ A p= resistivity l= length A= Area
Ohm's Law V= IR
Electric Power P = IV
Total Capacitance in Parallel Ct = C1 + C2 + C3
Total Capacitance in Series 1/Ct = 1/C1 + 1/C2 + 1/C3
Total Resistance in Series Rt = R1 + R2 + R3
Total Resistance in Parallel 1/ Rt = 1/R1 + 1/R2 + 1/R3
Force from a Magnetic Field on a moving charge FB = q v B sin θ When the angle is 90 the F is at its max. When it is parallel there is not force
Force from a Magnetic Field from a current in a wire FB = B I l sin θ
Magnetic Field from a current in a wire or Ampere's Law B = μo I / 2πr
Magnetic Flux φ = BA cos θ
Average Induced EMF € = - N Δφ / Δt N = Number of Loops
Induced EMF in a moving conductor € = B l v
Right Hand Rule for Force Fingers- B Thumb- v Palm - F
Right Hand Rule for Current Place thumb in direction of the current. Curve fingers point in the direction of the magnetic field.
Force of a charge moving in a curved path (three) F = mac = qvB = mv^2/r
Kirchoff's Junction Rule The sum of all currents entering a junction is the equal to the sum of all currents leaving that junction.
Kirchoff's Loop Rule The sum of the voltage changes around any closed pat of the circuit must be zero.
Magnetic Field inside a Solenoid B = μo n I μo = Vacuum Permeability Only if air is in the solenoid, if there is something else use μ which is magnetic permeability n= number of loops per unit length I = Current
Created by: cstephens125