Bob F Posted February 14, 2009 Report Share Posted February 14, 2009 Man A says circuit protection devices (e.g. fuses) are sensitive to current. Man B says they are sensitive only to voltage. Who is correct? Man A only. Man B only. both Man A and Man B. neither Man A nor Man B. Quote Link to comment Share on other sites More sharing options...
Adam F Posted February 14, 2009 Report Share Posted February 14, 2009 I guessed A for the record Bob - soon as you thought my earlier on was a fluke! Quote Link to comment Share on other sites More sharing options...
Barney Posted February 14, 2009 Report Share Posted February 14, 2009 Adam If you had a fluke a would expext you to get all these questions right. (Fluke is a good quality test instrument Manufacturer) Mick Quote Link to comment Share on other sites More sharing options...
Bob F Posted February 14, 2009 Author Report Share Posted February 14, 2009 If you'd have got this one wrong, Adam, after seeing the effects on those nice pink fuses today, I would have been very concerned for you. Well done that man! We'll make an electrician out of you yet. BF Quote Link to comment Share on other sites More sharing options...
Bob F Posted February 15, 2009 Author Report Share Posted February 15, 2009 A little bit of indicision on this one, with 3 different voting selections (by the way, I cannot see what you are individually voting). The correct answer is current. When current flows through a lamp filament or a cigarette lighter, heat and light are generated by changing electrical energy to thermal energy. The wire in a fuse melts from the heat generated when too much current flows. You could have as high a voltage as you like (within reason), but the voltage itself would not melt the fuse. It is the current that produces the heat and melts the fuse. Quote Link to comment Share on other sites More sharing options...
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