" 7.State joule's law of heating? "

(a) State Joule's law of heating. (b) an alloy of nickel and chromium is used as the heating element. Why ? (c ) How does a fuse wire protect electrical appliances ?

(a) State joule's Law of heating. (b) Name two devies where heating effect of current is utilised. (c) What is the name given to the commercial unit of electircal energy ? Express this unit in joules.

(a) State joule's Law of heating. (b) Name two devies where heating effect of current is utilised. (c) What is the name given to the commercial unit of electircal energy ? Express this unit in joules.

(i) State Joule's law off heating. (ii) An alloy of nickel and chromium is used as the heating element. Why? (iii) How does a fuse wire protect electrical appliances?

State Joule's law of heating effect of electric current. What is the cause of it ? Is it reversible or not ?

State Joule's law of heating by electric current. Name the materials used to making (i) standard resistors (ii) heater element.

Answer the following questions : State Joule's law about heating effect of electric current.

State Joule's law of heating and give its mathematical form. An electric iron takes a current of 5A and develops 1.5 xx 10^(4) J of heat energy in 30 s. Calculate the resistance of the electric iron.