Physics Past Questions and Answers

Find the effective resistance in the diagram above

Given the inductor of inductance 5mH, 10mH and 20mH connected in series, the effective inductance is

If electron are accelerated from rest through a potential difference of 10kv, what is the wavelength of the associated electron <br/>[m = 9.1 x 10<sup style='font-size: smaller;'>-31</sup>kg, e = 1.6 x 10<sup style='font-size: smaller;'>-19</sup>C, h = 6.6 x 10<sup style='font-size: smaller;'>-34</sup>js]

<table class='tbn'><tbody><tr><td> 14 </td>N + </td><td> 4 </td>He → </td><td> 17 </td>O + X </td></tr><tr><td> 7 </td><td> 2 </td><td> 8 </td></tr></tbody></table><br/><br/><br/><br/>In the equation above, the particles X is

I. Diameter of a small ball bearing.<br/>II. Thickness of a pieces of paper.<br/>III. Diameter of a measuring cylinder.<br/>IV. Length of a piece of wire.<br/>Which of the above can be measured using a micrometer screw gauge?