Save or or taken why

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.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't know (0)
Remaining cards (0)
Know (0)
0:00
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

# Stack #39336

### Electrostatic/magnetic/dynamic formulas

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)
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
What is the electric field (E) at a distance r away from a point charge Q? E = KQ/r^2
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
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
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
The electric field (E) between 2 plates d units apart with a voltage (V) across the plates is? E = V/d
A parallel plate capacitor has a capacitance (C), expressed in terms of area (A) and distance apart (d) of? C = (permittivity)*A/d
The electric energy (U) stored in a capacitor is? U = 1/2 CV^2 or (1/2)QV
Capacitors in parallel? C = C1 + C2 + ...
Capacitors in series? 1/C = 1/C1 + 1/C2 + ...
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.
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
Ohm's Law V = IR
Resistors in series? R = R1 + R2 + ...
Resistors in parallel? 1/R = 1/R1 + 1/R2 + ...
Units of magnetic field? Tesla
How does B vary with current and the distance from the current-carrying wire? B=kI/r
Force on a length L of a current (I)-carrying wire in a magnetic field B? F = ILBsin(theta)
Force on a charged (q) particle moving with velocity (v) through a magnetic field (B)? F = qvBsin(theta)
Undeflected motion of a particle through a magnetic field? r = mv/qB
Lorentz force (sum of electric and magnetic forces)? qE = qvB or E=vB
Faraday's Law induced emf = change in flux/change in time
Magnetic flux = BA sin (theta) or Q(enclosed)/permittivity
Induced current (I) =-Blv/R
Intensity of a sound wave= power/area
Transformer rule Vp/Np=Vs/Ns or Power in primary side=Power in secondary side
Velocity of sound wave= freq * wavelength
Doppler Effect= app freq = freq (v + vo)/(v - vs)
Snell's Law n1*sin(theta1) = n2*sin(theta2)
Created by: mikeriddell

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:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

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