give relation between joule and erg. Also derive dimensional formula of work.

Derive the relation between eV and J.

What is te relation between joule and kg m?

Give the relation between a.m.u. and MeV.

Give relation between a.m.u. and electron volt.

Define magnetic field. Write an expression for force on a charge q moving with velocity vecv in a region having uniform magnetic field strength vecB . How does the speed change as the charge moves? Under what circumstances the force vecF will be zero and maximum? also obtain S.I. unit of the strength of magnetic field. Also give dimensional formula of B.