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1 kWh = ________ J
How many joules are there in one kilowatt-hour?
1Kwh =`( 1 "volt "xx 1 am pere xx.............)/1000`
The diagram 31 shows a 3 terminal plug socket.
(i) What is the purpose of the terminal E?
(ii) To which part of the appliance is the terminal E connected?
(iii) To which wire L or N, is the fuse connected and why?
State three factors on which the heat produced in a metallic wire due to passage of current in it depends.
What changes in energy occur in an electric bulb?
How does the heat produced by die passage of current in a metallic wire depend on the time of passage of current in the wire?
Three 250 W heaters are connected in parallel to a 100 V supply, Calculate the resistance of each heater.
An electric lamp A of 40 W and another electric lamp B of 100 W are connected to 220 V supply. Calculate the ratio of their filament resistances?
