Save
Upgrade to remove ads
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

Physics Electricity2

Physics Spring Y12

QuestionAnswer
PD in series PD splits between components and always sums to EMF
Kirchhoff's second law Sum of EMFs in closed loop equal to sum of pds. It is a statement of conservation of energy
How to derive resistance in series Currents all equal Voltage total equals all voltage added V = IR sub into voltage equation RtIt = R1I1 + R2I2 + R3I3 Currents all equal so divide out Swap V and I strategies for parallel
How to do circuits with different power supplies Label current direction from biggest of EMF. Label each value of current with a differently numbered I. P.d within closed loop equals EMF. V of component is numbered I * R. EG i1 = i2 + I3 When doing diff power supply the voltage is -ve if against flow
How to phrase circuits with different power supplies answer for what direction it is flowing The magnitude is ___ going opposite to my assumed direction.
Why is a variable resistor used in potential divider circuits with e.g. LDRs Allows you to control what level of stimulus change causes the effect to happen
What to talk about with potential divider circuits with e.g. LDRs What component is, how res changes, how this changes share of total R, effects of this (e.g. as light up r down so share of total pf across ldr falls so output pd falls)
Internal R Mention K2L. EMF = Ir + IR (R load resistance) EMF and r constant Ir are the lost volts, used to move e Internal r intrinsic to any power supply. EMF stays constant but work done moving charges throu supply. Energy per unit charge lost: lost v
How to find r graphically Using K2, E = Ir + IR V = E - Ir IV graph, then r is gradient and E is y intercept
What does E = Ir + IR mean that increasing current does Increases the lost volts
For diagram about internal R Draw the internal R as a resistor inside a dotted box in series with power supply
Voltmeter across variable R (in a split resistor circuit). VR graph with V on y axis Current (gradient) changing, so curve
When there are 2 power sources with resistors between them finding I Calculate the resultant V and total resistance. V = IR
Negative Temperature Coefficient thermistor Normal type - we'll only ever be asked for this one
3 1.5V power supplies connected in parallel. What's the p.d. of the circuit? 1.5V because voltage equal in parallel.
Nice phrasing of J vs eV If 1C of charge moved through pd of 1V I will do 1J of work If 1 electron moved through pd of 1V I will do 1eV of work
Created by: Pyrogearos2
 

 



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