أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
A detail answer along with explanation is given at below link.
http://www.electricaltechnology.org/2013/10/power-factor-improvement-methods-with-their-advantages-disadvantages.html
A comprehensive answer is available at Mr Adnan Ahmaed Given Link.
