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Results tagged with Search options user 148308

The study of the presence and flow of electric charge. Charges, currents, fields, potentials.

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You need to investigate the circuit of your old equipment. How is the lamp powered ? Many older circuits used thermionic valves (aka tubes) and lamps were used in a series chain of the valve heaters. …
answered Mar 17 '17 by BetterBuildings
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Questions like this generally disturb me as I have visions of the poster or another reader attempting a "simple home experiment" with their household electricity. Are we all intelligent enough to …
answered Mar 12 '17 by BetterBuildings
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That's the trouble with textbooks like yours,they make generalizations which are silly. It's lazy (or ignorant) writers really. Electrical circuits span a huge field from tiny micro electronic devices …
answered Mar 28 '17 by BetterBuildings
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Here's a somewhat simple way of looking at it; All circuits, whether DC (battery) or AC (household mains) require a flow of electricity around a loop (preferably including a load otherwise its a …
answered Mar 21 '17 by BetterBuildings
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Current and voltage are different things. Any source of voltage be it a battery, solar cell, wall-wart power supply, your wall outlet, some overhead transmission lines or lightening has a limit on how …
answered Mar 13 '17 by BetterBuildings
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Back to some basics about electricity production first; Energy storage in a generating and distribution system is an attempt to cut off a bit of the peak generating requirement (which is otherwise …
answered Apr 27 '17 by BetterBuildings
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Breakdown voltage of dry air at 1 atmosphere between spherical electrodes is generally accepted to be of the order of 3.3kV per mm. With spikey electrodes and damp air its massively less but tricky to …
answered Mar 27 '17 by BetterBuildings
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No. Air is (luckily) non conductive otherwise our lives would be very different on this planet. In practice you would not be able to offer up a lump of ionized air to your induction coil, even if you …
answered Mar 30 '17 by BetterBuildings
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Domestic filament lamps are produced in their thousands on (generally) automated factory production lines. Buying one lamp with a rated life of, say, 1,000 hours does not mean it will last (about) 1,0 …
answered Mar 12 '17 by BetterBuildings
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You need to consider what an electricity transmission line is actually for. It is to transmit power from one place to another and will be designed to have a maximum power rating based upon its … specific function in the transmission grid. For example a new 200MW electricity generating station in coastal town A needs to connect to the existing grid which is 20km away. So the designers of the line …
answered Mar 12 '17 by BetterBuildings
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Please would amateur experimenters stop doing silly things like short circuiting batteries with paper clips ! This kind of stupidity is only a couple of steps removed from the lad at school who tried …
answered Mar 30 '17 by BetterBuildings
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This is really an Electrical Engineering but seeing as you and I are here I'll have a go with an answer. It is pretty well universally true that any electrical socket outlet in a domestic property in …
answered Mar 26 '17 by BetterBuildings
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Rewire the house properly with modern cable. Knob and tube is obsolete and well beyond it's design life. Either pay your baffled electrician the going rate to actually trace the problem OR get a bett …
answered Apr 11 '17 by BetterBuildings