Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

QuestionAnswer
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
Popular Physics sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards