Recent content by hello!!

@FOXBOX i guess its too late...but still, suppose the gas at pressure P applies force on the piston .then PA-friction=ma.where A is area and m is mass of piston,a is its acceleration. as m=0,f=0 implies PA=0,P=0 and no force is required to move piston.W=0. AND piston doesn't gain...

1. when there is a current in a loop and it is placed in a magnetic field then there will be the torque on it along the direction of mxB axis.but that axis will pass through which point.will that torque act through the center of the loop only?? 2. suppose a current (I) carrying loop (of R)is...