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For 12th class
1> Young's Double slit experiment should be done properly from the chapter Optics
2>combinations of Resistances and capacitance
Uses of semiconductors and diodes
rectifier function
  cyclotron ,Van de Graaf generator, transformer should be ready there will be one confidently 
6> electrostatics, AC ,current, magnetism derivation of these should be done

since i am student of 12th i answer for 12th if for 10th i donot know but basically 12th is the board
2 5 2
plz mark as brainiest plz i need it