What happened to the output current of the boost converter,is it remain same or vary?
The out current floe of the boost converter varies from time to time. This is because sometimes it is low while others it's high. However, the current is determined by the source because if there is high power, definitely the output current will be high. Read more on http://www.daycounter.com/LabBook/BoostConverter/Boost-Converter-Equations.phtml.
The boost converter can boost the voltage. If the resistance is the same, then the output current will be boosted.