I am doing a simple electricity experiment using a rheostat. The idea is to find V for different values of I. I found that I can find V for I=0.1,0.2 & 0.4 A. However I cannot get 0.3 A , however I adjust the rheostat. A new lab rheostat does not solve the problem. Any ideas?
Why is glass transparent and metallic copper is opaque?
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If a 1 kΩ and 2 kΩ resistance i parallel with a 1.5V battery, which resistance have a higher temperature? Is it IxIxR ? Which is true, higher current, higher temperature or higher resistance, higher temperature?
Let's say I have two pairs of identical magnets. The first pair is 1 Tesla. The second pair is 2 Tesla. If I have like poles facing each other as below, would the total force on the balance be the same?
I have done an experiment and the results were plotted by excel program. However the experimental curve was much lower then my calculated curve. The experimental results were 62% less then the theoritical result. I obtained the 62% by trial & error + guess work. Is that saintifik? Is my method a numerical analysis? If not what shall I call my method?