Tender For supply of resistances in series and parallael apparatus , conversion of galvanometer into ammeter and voltmeter apparatus , wave motion machine hand operated , spring balance , young double slit apparatus , electronic component kit , oersteds experiment kit , conservation of energy momentum model , fleming right hand rule working model , fleming left hand rule working model , magnetic field through a rectangular liquid filled model , viscosity apparatus , mutual induction model , nuclear fission working model , satellite model