- #1

Simmer

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Hello guys, so I had a homework and I couldn't understand the point of my teacher. The question goes like this:

http://desmond.imageshack.us/Himg3/scaled.php?server=3&filename=21976607.jpg&res=medium

So the question is,

"Calculate the voltage drop over the TRAIN when it is at the position indicated"

Alright so he asked for the voltage that goes to the train, therefore,

V=IR

V=1500

I=300

R=The resistor the current will go through before it hits the train which is 0.140

V=300*0.140 ----> V=42

So the Voltage that will go through the train is going to be 1500-42 ------> v=1458

My teacher said it's wrong, I should calculate the total resistance of the circle which is 0.140+0.044 and then multiply by the current, but I don't understand! the question asked about the resistance over the train only not over the whole circle, anyone can help?

http://desmond.imageshack.us/Himg3/scaled.php?server=3&filename=21976607.jpg&res=medium

So the question is,

"Calculate the voltage drop over the TRAIN when it is at the position indicated"

Alright so he asked for the voltage that goes to the train, therefore,

V=IR

V=1500

I=300

R=The resistor the current will go through before it hits the train which is 0.140

V=300*0.140 ----> V=42

So the Voltage that will go through the train is going to be 1500-42 ------> v=1458

My teacher said it's wrong, I should calculate the total resistance of the circle which is 0.140+0.044 and then multiply by the current, but I don't understand! the question asked about the resistance over the train only not over the whole circle, anyone can help?

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