http://www.sgforums.com/forums/2297/topics/316272 en-US 60 <blockquote> <div class="quote_from">Originally posted by ChoCoChips:</div> <div class="quote_body"> <p>eh and hor,</p> <p>why input voltage ish got the cos and sin one?</p> <p>i tot it's just 240v and 0 degrees only?</p> </div> </blockquote> <p>oh ya hor... me mess up liao...</p> <p>hahahaaa... it is 240V with 0 degrees...</p> <p>:p</p> <p>&nbsp;</p> Fri, 02 May 2008 22:36:11 +0800 www.sgforums.com:2297:316272:8056437 ispyyy http://www.sgforums.com/forums/2297/topics/316272 <p>eh and hor,</p> <p>why input voltage ish got the cos and sin one?</p> <p>i tot it's just 240v and 0 degrees only?</p> Fri, 02 May 2008 22:30:37 +0800 www.sgforums.com:2297:316272:8056416 ChoCoChips http://www.sgforums.com/forums/2297/topics/316272 <blockquote> <div class="quote_from">Originally posted by ChoCoChips:</div> <div class="quote_body"> <p>die.</p> <p>i got different values leh.</p> <p>hahaha chui liao la me</p> </div> </blockquote> <p>&nbsp;</p> <p>who noes???</p> <p>u maybe correct lor...</p> <p>I long long long long long time never do this type of question liao... :p</p> <p>&nbsp;</p> Fri, 02 May 2008 22:29:47 +0800 www.sgforums.com:2297:316272:8056411 ispyyy http://www.sgforums.com/forums/2297/topics/316272 <p>die.</p> <p>i got different values leh.</p> <p>hahaha chui liao la me</p> Fri, 02 May 2008 22:26:01 +0800 www.sgforums.com:2297:316272:8056399 ChoCoChips http://www.sgforums.com/forums/2297/topics/316272 <p>I forgot on the power fomular...</p> <p>Dont noe it is the real number of whole answer or real number x real number....</p> <p>hahaahaha...</p> <p>Check it out yrself lor...</p> <p>:p</p> <p>&nbsp;</p> Fri, 02 May 2008 22:16:06 +0800 www.sgforums.com:2297:316272:8056378 ispyyy http://www.sgforums.com/forums/2297/topics/316272 <p>lol... try ah...</p> <p>Input Voltage</p> <p>= 240( sin 2*pi*50 + jcos 2*pi*50)</p> <p>= 240( -0.26 +j0.96)</p> <p>= -62.4 +j230.4</p> <p>Total input impedence</p> <p>= 1/(1/z1 + 1/z2 + 1/z3)</p> <p>=2.33+j1.1</p> <p>Total current</p> <p>= Total voltage/Total impedence</p> <p>= 16.27+j91.2</p> <p>Total input power</p> <p>=| Re {VI} |= 22028</p> <p>Total reactant power</p> <p>= | Img {VI} | = 1941</p> <p>&nbsp;</p> <p>jwC + 1/Zin = Re number</p> <p>Hence,</p> <p>if 1/Zin = 0.35-j0.17,</p> <p>jwC =&nbsp;j0.17</p> <p>C = 5.4x 10E-4 F</p> <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> Fri, 02 May 2008 22:13:34 +0800 www.sgforums.com:2297:316272:8056371 ispyyy http://www.sgforums.com/forums/2297/topics/316272 <p><img src="http://i31.tinypic.com/2ic5v1w.jpg" alt="" /></p> <p>pls help me.</p> <p>i do liao but dunno answer correct anot.</p> <p>thanks!</p> Fri, 02 May 2008 21:44:09 +0800 www.sgforums.com:2297:316272:8056289 ChoCoChips http://www.sgforums.com/forums/2297/topics/316272