I. Expression for acceleration due to gravity: Consider earth to be a sphere of radius 'R' and mass 'Me'. Suppose a body of mass 'm' is placed near surface of earth then it is reasonable to assume...
Solving a mechanics problem especially at JEE level is all about getting into right thinking framework. Step 1: Picking a frame of reference. It can be solved from inertial frame of reference or non-nertial...
current or voltage we measure for AC are alaways rms(root mean square) value not the actual magnitude so 220 volt ac(rms)= 220*sqrt(2)=311 volt but 220 volt DC alaways gives the magnitude...