Where Can I Find Good Physics Concept Questions Online?

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Does anyone know of a good site that has good physics concept questions because our tests in class are 10 multiple choice questions--usually concept questions (since we can't use a calculator just like the AP Exam) and two free response questions.

i need a little help with those concept questions...i always take too long on them and get them wrong afterwards


thanks

--i know this isn't an actual homework problem, so i don't know if I'm supposed to post this somewhere else. so sorry if i put it in the wrong place
 
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