IB Physics: Potential Dividers

  Рет қаралды 33,375

Chris Doner

Chris Doner

Күн бұрын

Пікірлер: 26
@tomtucker4034
@tomtucker4034 6 жыл бұрын
My life saver, thank you. You helped me so much as my teacher did not teach this topic and the book explains it wrongly.
@tumulkumar5626
@tumulkumar5626 7 жыл бұрын
Mr Doner, you have been my go to person for all the physics topics. Thank you very much for all these great videos. As I am officially done with IB Physics, I will now be unsubscribing to this channel; but I will spread the word about this amazing channel to my juniors.
@swasthikas7652
@swasthikas7652 4 жыл бұрын
Why unsubcribe?
@aviationgio
@aviationgio 8 ай бұрын
Why unsubscribe?
@Piritiup
@Piritiup 7 жыл бұрын
you are a life saver
@denzeltracy
@denzeltracy 7 жыл бұрын
+1
@jadkhoury6983
@jadkhoury6983 5 жыл бұрын
At 13:18 , How did you know that the load resistor (2000 ohms) will be in parallel and not in series with the variable resistor (2 ohms)?
@donerphysics
@donerphysics 5 жыл бұрын
We are not putting anything in series with the rheostat, we connect the load across.
@jadkhoury6983
@jadkhoury6983 5 жыл бұрын
@@donerphysics oh thank you!
@piperbrooke2957
@piperbrooke2957 3 жыл бұрын
Hello! Amazing video, but I just had one question. When calculating voltage across a load resistor with a resistance similar to that of the potentiometer, why would you need to find the equivalent resistance of the load and bottom? Isn't voltage the same across parallel branches, so I could just calculate the proportion of voltage across the bottom resistor?
@donerphysics
@donerphysics 3 жыл бұрын
You are correct to say that the parallel resistors will have the same voltage across them, however, to calculate the proportion of the voltage, you need to determine the parallel resistance of the load and bottom of rheostat. If the load resistor is much larger than the equivalent resistance, this will simply equal the contribution from the rheostat.
@ayanoaman3179
@ayanoaman3179 8 ай бұрын
Thank you for your efforts :) your explanation is very clear and helpful ❤
@alaaosama9639
@alaaosama9639 3 жыл бұрын
such a lifesaver !!!
@donerphysics
@donerphysics 3 жыл бұрын
Glad you think so.
@pushpamahadevan7242
@pushpamahadevan7242 7 жыл бұрын
A very helpful video. Thank you.
@sondrewikberg3534
@sondrewikberg3534 6 жыл бұрын
Is output voltage the voltage across the load resistor?
@donerphysics
@donerphysics 6 жыл бұрын
Essentially, yes. If you watch the video on internal resistance, you will see that not all the battery voltage will appear across the load because there is internal resistance within the battery.
@nnivetha1986
@nnivetha1986 7 жыл бұрын
Thanks for the video! For the problem in 11:26, your method was amazing but is there a shortcut because I feel like I would spend too much time figuring out just one question! Could I use this logic: since X breaks, no current flows through Z (since Z and X are in series) so Z's brightness decreases. Since Z's brightness decreases, Y's brightness increases (since Y and Z are in series). Is this logic accurate?
@donerphysics
@donerphysics 7 жыл бұрын
If X breaks current will still flow through Z.
@thorchh
@thorchh 3 жыл бұрын
thank you so much
@donerphysics
@donerphysics 3 жыл бұрын
You're welcome!
@muskaan4168
@muskaan4168 7 жыл бұрын
thanks a lot
@pubgplayer1720
@pubgplayer1720 3 жыл бұрын
I live your videos, but I like them even better on 1.5 x speed :)
@donerphysics
@donerphysics 3 жыл бұрын
Many do this .... makes me sound like a chipmunk though.
@audrikachowdhury4316
@audrikachowdhury4316 5 жыл бұрын
hi sir, what do you mean by load voltage or loads resistor
@donerphysics
@donerphysics 5 жыл бұрын
The voltage across the load resistor. The load is really just the "thing" connected to the battery.
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