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AP Physics 1: 1.4 Changes and Conservation Laws 177 Views


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AP Physics 1: 1.4 Changes and Conservation Laws. Find the current across R 2 .

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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

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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