<p>Diagnostic Test is just for checking your basic understanding and your strong and weak points. As such, its easier. (Barron’s of Physics is easier than compared to other books unlike maths one, which is harder).</p>
<p>i would say about 720 - 760 . But remember, prediction is always based on half knowledge. And hhome conditions can never precisely mirror with the Test conditions.</p>
<p>i.e The stress of unable to do a question, strict timing, etc is not there.</p>
<p>I got 730 on my diagnostic test. 780 on my first test, and 770 on my second test.</p>
<p>Ended up with a 790 in the actual which was much harder than the barron tests. I suggest use more than one book to prepare yourself for the test. One book cant cover all the topics that the collegeboard might test you on.</p>