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AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R2.
We're not going to force you to answer this question about forces, but we suggest you gravitate towards it anyway.
Ah, the age old question: how long do I have to wait to stuff my face? Grab a snack and give this question a shot.
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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