you can make it brighter by adding another battery/cell
you jelly faaces
no
The bulb will get brighter
no
It gets brighter and brighter - until it burns out.
The bulb becomes brighter unless it is too much till it shot-circuits.
change the battery
The Shorter the wire the brighter the bulb ! Because if it is short then it get brighter and the more batterie the brighter the bulb ! Or the lower voltage the brighter the bulb !
I you wired a light bulb in to the same circuit you have the possibility of over loading the circuit but other than that it would just be brighter.
it explodes
We did this experiment in class, the more batteries added, the brighter the bulb will become!
That does not depend directly on the brightness of the bulb, it depends on the current drawn by the bulb (which depends on the efficiency of the bulb). For example an incandescent bulb will draw much more current than a much brighter CFL bulb or LED bulb. Therefor switching to an brighter LED bulb can make the battery last much longer while switching to a brighter incandescent bulb will make the battery run down quicker.
Wipe it with cloth I guess?
Usually a higher voltage will make a light bulb shine brighter; but if the voltage is too high, this can also destroy the light bulb.