Question

I want the best easy simple working model for science exhibition with its steps.

Answer 1

the best easy simple working modle can be a 'electromagnetic train 'which work on principle of magnetic field .
you need-
1. track made of perfectly coiled pure copper wire .
2. a AA duracell of high power
3. 4 PIECES OF NEODYMIUM MAGNETS . (SIZE MUST BE BIGGER                   THAN DIAMETER OF CELL)
STEPS-
1. MAKE A WELL COILED TRACK OF COPPER WIRE .
2. ATTACH THE 2 MAGNETS ON +VE SIDE OF CELL AND 2 MAGNETS ON -VE SIDE .
3 . PLACE THE CELL INSIDE THE COIL FROM ONE SIDE .

YOU WILL OBSERVE THAT THE CELL ALONG WITH MAGNETS COME OUT FROM OTHER SIDE OF COIL . BY THIS YOU CAN PRESENT A SUPER MODEL .