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Changes and Conservation Laws Videos 16 videos
AP Physics 1: 2.5 Changes and Conservation Law. At what point(s) in this situation is energy lost in any form?
AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R2.
AP Physics 1: 2.4 Changes and Conservation Laws. Which of the following circuits should the students use?
AP Physics 1: 1.4 Changes and Conservation Laws 177 Views
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Description:
AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R 2 .
Transcript
- 00:00
Hurry And here's your shmoop du jour Brought to you
- 00:05
by electrical resistance and not the resistance You had toe
- 00:08
whatever that weird casserole was last night All right check
- 00:11
the following diagram right here Oh my yeah The circuit
- 00:16
diagram above has a battery of the vault And two
Full Transcript
- 00:20
resisters are one and our two in parallel The equivalent
- 00:24
resistance of the circuit is ten homes and a battery
- 00:28
contains twenty volts If the current across our one is
- 00:33
zero point five amperes what is the current across our
- 00:37
too Uh you're a potential answers on piers Well when
- 00:43
we're dealing with circuits like this we need to remember
- 00:46
kirchoff junction rule with states When we come to a
- 00:49
junction in the road Always take the path less travelled
- 00:52
Wait Sorry That's Robert frost junction rule and that's A
- 00:55
different part of shmoop Okay Anyway kurt chops junction role
- 00:58
means that the total current coming into a circuit junction
- 01:00
equals the total current coming out of that junction that's
- 01:04
Because the law of conservation of electric charge which states
- 01:07
that charge can't be created or destroyed in a closed
- 01:10
system So answer this question We first need to figure
- 01:14
out the total amps that we're dealing with and for
- 01:16
that we'll use homes law will owns law states that
- 01:19
voltage equals amps times resistance way have the voltage and
- 01:24
we have the resistance right here and here so let's
- 01:27
just plug in the numbers Now we know that in
- 01:29
one of the resisters that current is point five names
- 01:32
since the current bullets resistors has to equal two amps
- 01:36
The current resistor too has to be one point Five
- 01:38
amps still a correct answer Just see remember A closed
- 01:43
system means that the total charge can't change no matter
- 01:46
how it's divided up And that weird casserole stayed the
- 01:49
same too even though we tried to mask it with
- 01:51
salad dressing The dog seemed to like it though but 00:01:54.595 --> [endTime] will she likes everything
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