Physics 13.4.2e - Parallel Circuit Example

Example problem - solving a circuit with two resistors in parallel. The problem is worked out and the concepts are explained in detail. From the Physics course by Derek Owens.

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Education

Tags:

• Physics
• circuit
• circuits
• parallel
• parallel circuit
• parallel resistors
• parallel circuit example
• resistors in parallel
• parallel circuits
• homeschool
• distance learning
• Derek Owens

[dnandy100]

When you say V = V1= V2= 120V. I find it little confusing, because V1 is a voltage drop at R1, similarly V2 is voltage drop at R2. So, according to the previous explanation, the total V= 120 V=V1 + V2. Like you said before the voltage drop is same in V1 and V2. But, I am unable to understand, how come V1 and V2 individually is equal to V. Please explain. Thanks.

[derekowens]

@dnandy100 120V would equal V1 + V2 if the two were in series. If they are in parallel, then V1 and V2 each equal 20 Volts. In parallel, the voltages are the same. In series, the voltages add up.

[KevinBarbossa]

so does this mean that for all examples i could skip the arithmetic for total amps in the last part and jus add the the number of amps i calculated at the beginning when i solved for I (current)

[derekowens]

@KevinBarbossa If everything is in parallel, yes, if I understand your question.

[andersonlavor]

Use the windows calc ( Reciprocal key is on top of = key)

do like this:

type in the resistance 60 ohms press the key reciprocal 1/x which becames 0.01666.... then press + and type 20 ohms then reciprocal key 1/x it becames 0.05 then press equal = that results 0.0666666... then you press reciprocal key 1/x again and boom there it is ... 15 ohms

[derekowens]

@andersonlavor  very nice!

[findingtime5]

Thank you so much..I've watched most of your videos with having little knowledge in this area for my physics 2 class and am up to par now because of these videos. All your videos make everything so easy to understand. Very much appreciated. Your method of teaching is awesome, I just wish everyone taught like this. Thanks!

[Midgetman303]

@samanferrari There shouldn't be. The voltage drop should equal the sum amount of the voltage that is applied through your power source. (or battery)

[samanferrari]

is there a difference between voltage and voltage drop?

[therealjordiano]

thank you so much :D

[themakerofmine]

Nice video. Thank you!

[mrparkin0tunes]

Khan academy doesn't cover this. and u have better software =]

[abawi192072]

u r the best teacher.........