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

Resistance

Physics

QuestionAnswer
What happens when you make adjustments to electrical appliances? e.g.turning up the volume on a Tv Resistance is altered
When you do this, your adjustments are also altering the what? Voltage/current in the circuit
All components in a circuit offer what? Some resistance
Connecting wires have how much resistance? Very low, so they let charges pass through very easily
Why might it be harder for current to flow through some other components? If they have higher resistance
when current flows, some energy is used to... move the charges through them and is converted to heat
What is the resistance, voltage, current equation? Voltage = current x resistance
In a thermistor, if the room is cold, will the resistance be higher or lower? Higher, more free electrons to prevent current from flowing
If it's hot, will the resistance be higher or lower? Lower, less free electrons to prevent current from flowing
If an LDR (light dependent resistor) is placed in a dark room, will the resistance increase or decrease? Increase
If an LDR is placed in a light room, will the resistance increase or decrease? Decrease
Explain how a thermistor could be used in a fire alarm When the temperature rises, the resistance will decrease so current can flow through the circuit and set off the alarm.
Explain how an LDR could be used in a light sensitive circuit When the light is shone onto it, the resistance will decrease so more current can flow through the circuit.
Created by: eloiseis
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