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June 15[edit]

Uploading an exercise online[edit]

What's the easiest way of uploading exercises for a small group of people (~15)? It has to allow the students to check their answers and some way of tracking results (to know who answered what, how many times they tried). It does not have to be for free. --Clipname (talk) 16:42, 15 June 2017 (UTC)[reply]

Blackboard and Moodle are common tools for this. 209.149.113.5 (talk) 17:57, 15 June 2017 (UTC)[reply]

You could also do it "old school", and email them each a blank exercise form, which they fill in and email back to you for checking. This may be better for subjective tests, where you need to evaluate essays, etc. Of course, you would then need to track the results manually, but for 15 students, that seems doable. StuRat (talk) 21:28, 16 June 2017 (UTC)[reply]

Why and what it is ?[edit]

I bought to ease and effectivate the Multimeter use - instead of the two blunt needle-likes as are always supplied along Digital Multimeter, I could use now alligator grips (or whatever they are called), and also the spring-loaded ones that are quite effective in gripping minutest of parts as shown [1].But in practice I even was unable to get precise resistance of required components (which can be measured exactly by using simple red and black wire terminals supplied by original manufacturer.) The problem is a small black box which, when opened shows this is [2]. Can anyone please explain the purpose of it here ? And what could be done to it or to something else to make the DMM's working ideal ? 27.255.221.168 (talk) 21:02, 15 June 2017 (UTC)[reply]

It appears to be a resistive voltage divider. I'm unable to make out the resistor colour codes to determine their values, but these things typically extend the voltage ranges by 10 times. That means if your meter has 500V as its highest range, the device extends it to 5,000V. A resistive divider like this should not be used when measuring resistance, for obvious reasons. Akld guy (talk) 21:42, 15 June 2017 (UTC)[reply]

Weird, I'v never sen anything like it. Where did you get it, what is it called? I don't see any alligator clips, just spring loaded test leads. As far as I can see the resistances are small so it would be to allow measuring current rather than resistance or voltage but the original description when it was sold to you should say more. Dmcq (talk) 10:18, 16 June 2017 (UTC)[reply]