State four most common electrical appliances based on heating effect of electric current. Why do we use finely heated platinum wire in surgery?
Appliances based on heating effect of electric current are:
1) Electric heater
2) Electric iron
3) Microwave oven
4) Induction cooker
Finely heated platinum wire is used in surgery rather than knife because melting point of platinum is 1768 ∘C is very high so it does not get melted easily when heated for cutting the tissues while doing surgery.