Magnetisation of a nail using electric battery

Preparation of Red litmus paper with Hybiscus

circular coil rotates when current passes through it and the axis is normal to the magnetic field

gold leaf test for static electricity

Static electricity with a bend and a comb

magnifcation of a nail with electricity

Surface Area of a sphere

Roman balance

Borewell prepared with a pen and Ball pen refil

Electrical circuit through impure water