How do you suppose a nearby (but not direct) lightning strike could damage the tuner in your TV, which was turned on? (i.e. Why is it a good idea to unplug TVs and computers when an electrical storm is very close?)
2007-11-28 15:47:25 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
The large static charge buildup that causes lightning. Locally, that charge can dissipate to ground by way of the lightning rod on your roof, the lightning arrestor on your antenna leadin, or your TV tuner which was designed for microvolt signals instead of kilovolt signals. Same for telephone and cable TV lines. The strike itself induces large voltage spikes in power lines. Locally, they can be dissipated at the large MOV surge protector at your service entrance (seldom used), the surge protector at your outlet, or all your electronic equipment.
Now, look around and see how well you and your equipment are protected. If you take the 'unplug' route, make sure you unplug everything you care about from power, antenna, and phone lines, for every storm, before the first lightning strike. Then, hope a discharge doesn't start a fire in your house instead of frying your TV.
2007-11-29 09:08:12 · answer #1 · answered by Frank N 7 · 0⤊ 0⤋
maybe because the T.V. antenna is connected to the tv and so when it conducts lightning, the lightning is also passed to the T.V.
2007-11-28 18:47:50 · answer #2 · answered by Robert Angelo V 2 · 0⤊ 0⤋