When a vapour is excited at low pressure by passing an electric current through it, a spectrum is obtained. : Draw a spectral series of emission lines in hydrogen

What are the substances obtained when electricity is passed through acidified wa-ter?

Neils Bohr was the first to explain quantitatively the general features of hydrogen atom structure and its spectrum. b) Find the maximum number of emission lines, when the excited electron of hydrogen atom in n=6, drops to the ground state (n=1).

"When electric current is passed through a resis tance wire, it get heated up" . Name the law associated with this phenomenon.

When an animal touches an .electric-fence. the ani mal gets a shock by completing an electrical circuit.How much charge passes through the animal, if it receives a current pulse of 20mA for 0.1 seconds.