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Hello!
I have a suggestion for the forum: when people have quick questions that can be answered in only one post, they don't need to make a whole new thread just for that. Instead, why not there be a "Quick Questions" sticky thread in each board? Or even a "Quick Questions" board in the General category?
I await you opinion!

P.S. I have a quick question that you might be able to answer: I measured the resistance of a DC motor on my multimeter. It was 2.5 ohms. So would that resistance change if I apply more voltage to it? Or will it stay the same (at 5V, it will use 2A.) By the way, it is just a regular hobby DC motor.
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I don't think you connected the grounds, Dave.
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when people have quick questions that can be answered in only one post, they don't need to make a whole new thread just for that
no, you're right, they can just Google "Ohm's Law"
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I have a suggestion for the forum: when people have quick questions that can be answered in only one post, they don't need to make a whole new thread just for that. Instead, why not there be a "Quick Questions" sticky thread in each board? Or even a "Quick Questions" board in the General category?
I await you opinion!

dkl65  I'm absolutely agree with you , it will be great .
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Hello!
I have a suggestion for the forum: when people have quick questions that can be answered in only one post, they don't need to make a whole new thread just for that. Instead, why not there be a "Quick Questions" sticky thread in each board? Or even a "Quick Questions" board in the General category?
I await you opinion!

P.S. I have a quick question that you might be able to answer: I measured the resistance of a DC motor on my multimeter. It was 2.5 ohms. So would that resistance change if I apply more voltage to it? Or will it stay the same (at 5V, it will use 2A.) By the way, it is just a regular hobby DC motor.
I don't think it is a good idea. Why? I don't think the writer of a question is capable of knowing the length of an answer.
I know from personal experience:
I have posted questions thinking this is going to be real hard to answer; which were answered 100% correctly with 1 short sentence.
I have asked questions I thought were easy but were discussed in length and beyond my comprehension by the specialists.

so for instance your P.S. question: I can simply answer: The resistance does not change when applying a different voltages. I can also add running a regular hobby DC motor with 2.5 oms on 5Volt will not use 2A.
Both answers are 100% correct but will confuse you as your assumption that only the internal resistance plays a role in the current usage is wrong. In other words you are missing a big part of the story. So if I want to help you (and any reader who doesn't know the full story); I need to be far more extensive than: yes no.
In short your example also shows the poster can not know whether a question is simple to answer or not.

I also agree with AWOL: Simple to answer questions can most likely be solved by using google. No need to bother real people spending their personal time with those. for instance lmgtfy.com/?q=dc+motor+current+voltage+relationship

Best regards
jantje



 
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In theory there is no difference between theory and practice, however in practice there are many...
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I like the idea however if you look at the average quality of the initial questions there is a lot of difference in the information posted.
How often do you see as first reply "can you post code , schematic a link to datasheet or sensor etc"
That means that before the first real answers comes you have 4 posts already.

Formulating good and unambiguous questions is still a fine art imho smiley
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Rob Tillaart

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