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Questions tagged [electromagnetism]

Electromagnetism is the branch of science concerned with the forces that occur between electrically charged particles. Use this tag for anything related to electricity, electrical or magnetic fields (such as microwave radiation), etc.

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1answer
401 views

Do crystals protect against EMF

There is no shortage of claims that certain crystals block/absorb electromagnetic fields (EMF). Independent of whether EMF is actually harmful, does a crystal on a necklace protect a significant part ...
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1answer
2k views

Can voice signals be radio-transmitted to a human head acting as a radio receiver?

US Patent 6470214 was recently mentioned on a Jesse Ventura's television program, "Conspiracy Theory", in relation to government mind control experiments and weapons. Now normally, the whole point of ...
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1answer
366 views

Is the Infinity MG10 a working generator that consumes no fuel?

Infinity Sav are a company pushing a product, the MG10 which is available for pre-order which, they claim, can generate electricity without consuming fuel - i.e. is a free energy machine. The ...
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3answers
5k views

Do tinfoil hats protect against any sort of radiation?

Delusional conspiracy theorists are commonly portrayed as wearing tin-foil hats to protect against mind-control rays from sinister organisations such as [goverments/aliens/NSA/CIA/FBI/liberals/...
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2answers
2k views

Can high-frequency coil radiation kill disease? (e.g., Lakhovsky's multiple-wave oscillator [MWO])

The idea of an oscillator-based healing device was popularized by Georges Lakhovsky and is now associated with scientists like Tesla, Clark, and Beck. There are many YouTube videos dedicated to ...
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1answer
800 views

Are earth-grounding mats (designed for connecting humans to earth-ground) effective and safe?

The website Earthing [Warning: auto-playing video] sells earthing mats. The site states: Throughout history, humans walked barefoot and slept on the ground. But modern lifestyle [(shoes, beds, and ...
18
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2answers
34k views

Do electric heaters with open heating elements “dry the air” or “burn up oxygen”?

There is a popular belief in Russia that electric heaters with an open nichrome heating element (red hot) "burn up oxygen" and "dry the air", unlike oil-filled ones. Is it true that a Joule heater ...
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1answer
416 views

Do electromagnetic fields affect stress and the fight or flight response?

ArmoredSkeptic said on a recent video about ghosts that: EM fields actually trigger our fight or flight response Is that true?
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1answer
1k views

Can an electric chair shock raise your hair?

What the title says- is it as it is often portrayed in cartoons?
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3answers
5k views

Can 'resonant frequencies' kill cancer cells?

According to some guy called Anthony Holland, you can kill cancer cells with resonant frequencies: "Cancer Research", Novobiotronics; "Shattering cancer with resonant frequencies: Anthony Holland at ...
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1answer
8k views

Do Rife machines kill viruses and bacteria?

Supporters of the Rife machine claim that virus and bacteria can be killed setting the machine at the right electromagnetic frequency. Rife also reported that a 'beam ray' device of his invention ...
11
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0answers
7k views

Does a mobile plugged in to the charger produce more EM radiation?

I've been hearing this a lot lately, but I can't seem to find anything to disprove (or prove) this claim. I know that a weak signal means the phone produces more radiation (which makes sense), but a ...
18
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2answers
7k views

Are electric chairs powered by generators connected to the mains in the same building?

There's an episode in The Green Mile movie where the death row servicemen rehearse the upcoming execution that is done using an electric chair. One of them says (quoted from here): Roll on one. [...
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1answer
9k views

Antistatic bracelet without a ground connection

Last winter in Japan, some of my friends were buying bracelets like this, that claim to prevent or reduce static shocks: Here is an advertisement picture describing how it is supposed to be used, ...
11
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1answer
607 views

Is keyless theft/relay theft a practical threat for vehicles with fob/keyless entry?

Some sites, such as AutoExpress, are warning about a method of breaking into vehicles with keyless entry by capturing and relaying the fob's signal. To quote AutoExpress: The process criminals use ...
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1answer
528 views

Do we have enough renewable energy for a humanity only using electrical cars? [closed]

One of my relatives claimed that electrical cars are overhyped and my relative somewhere read that we don't even have enough (renewable!) power to support a humanity in which only electrical cars are ...
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1answer
830 views

Does using BlueTooth devices cause leakage of the blood-brain barrier?

In 2012, the EMFacts Consultancy blog quoted Cindy Sage as saying: People should realize that Bluetooth devices that fit in or around the ear typically radiate at 0.23 watts per kilogram (W/Kg). [.....
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1answer
5k views

Does recharging a battery when it is only half-way dead decrease its life span?

One thing many manufactures of laptops and cellphones recommend is that you wait until the battery is completely dead before you recharge it or else it will slowly loose its maximum capacity or have a ...
12
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1answer
800 views

Do the mountains around this Norwegian valley act like a giant battery?

The Gizmodo website has this article about the UFO-like lights often seen at night in Hessdalen, Norway. The article, titled "Why Mysterious UFO-Like Lights Glow in this Norwegian Valley", says that ...
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3answers
25k views

Does the “Spike Buster” reduce electricity consumption?

My dad just bought a device that claims to reduce electricity consumption in the house. It is called a Spike Buster It is just a small box with a led that you connect to any socket in the house. It ...
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2answers
5k views

Does never charging a laptop battery to more than 80% capacity increase its lifespan?

In relation to Does recharging a battery when it is only half-way dead decrease its life span? I read an article about Maximizing the lifespan of a laptop battery where Samsung puts it: Most ...
16
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1answer
1k views

Could a single nuclear EMP kill 90% of Americans within one year?

From the latest doomsday scenario: At a U.S. House of Representatives hearing on October 12th, experts warned that the greatest existential threat to the country may come from the detonation of a ...
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1answer
1k views

Death by electroshock from 12V battery

A solar power book makes this claim: A low voltage system can cause major problems simply because of the huge current that a 12v battery can generate: in excess of 1,000 amps in short burst can ...
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1answer
7k views

Did Benjamin Franklin perform an experiment by flying a kite in a lightning storm?

Is there any credible evidence that Benjamin Franklin actually did his famous kite experiment?
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1answer
809 views

Is it possible to disable a vehicle with microwave oven magnetron from that distance

In the wellknown Youtube channel there is a scene where scooter had some kind of short circuit caused by magnetron used as a weapon from a distance. I never saw this channel to have fakes but one guy ...
25
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1answer
31k views

Does home-WiFi expose you to less radiation than using the 3G on your cell-phone?

Are there any studies that compare WiFi and cellular data usage, in the home, over time? Mainly I've heard that WiFi uses more battery (so it should emit more radiation) but OTOH it feels like 3G/...
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0answers
84 views

Electro sensitivity - is it a thing? [duplicate]

Recently, a coworker brought up electro sensitivity as something to consider when developing new communications technology. What little I have researched so far The WHO claims that the majority of ...
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3answers
1k views

Does the EM drive (electromagnetic drive) work despite the apparent lack of propellant?

In recent headlines, a supposed EM drive, or RF resonant cavity thruster, has been reported to produce thrust despite the apparent lack of any propellant. The drive is purported to work by pushing ...
29
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2answers
98k views

How much does wet sponge matter in electrocution process?

In Stephen King's novel The Green Mile and its film adaptation one of the characters (Eduard Delacroix) is getting electrocuted. Before the execution one of the correction officers instead of wetting ...
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0answers
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Is hair charged with static brittle and susceptible to breakage?

It is said that plastic combs produce static electricity therefore we should use wooden combs. http://www.joybynature.com/blogs/beauty-style/41263937-6-surprising-benefits-of-using-neem-wood-comb-for-...
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0answers
76 views

Are cell phones harmful to male fertility if kept in trousers pocket? [duplicate]

Several studies or press articles suggest that keeping a cell phone in a male's trousers pocket (and cell phone usage in general) may harm that men's fertility (increase sperm issues): http://www....
10
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1answer
15k views

Can magnetic resonance through TV and cell phones control your mind and emotions?

I saw this picture on FB with 1,200 likes and 9,738 shares The graphic reads, GOOGLE THIS NUMBER: US6506148 B2 IT'S NO LONGER A CONSPIRACY THEORY... YOUR TELEVISION IS BRAINWASHING TOOL USED TO ...
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1answer
604 views

Was this video of a home made phone charger faked?

A friend of mine recently shared this video on his timeline about turning a cellphone charger into a wireless charger. I am certain that this video is wrong, but I don't know how to eloquently ...
77
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3answers
9k views

Does Electromagnetic Hypersensitivity (EHS) exist?

A recent article from Daily Mail cited the case of a woman claiming to be allergic to Wi-Fi, and that it could even kill her. This claim sounded ridiculous and absurd to me. Quoting parts of the exact ...
3
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0answers
463 views

Can this Indian teenager resist 11kV electric shocks without dying?

Many online sources report on the Indian teenager Deepak Jangra (Daily Mail, Mirror) who claims to be able to resist 11kV electric shocks. They include images of him touching an exposed mains wire ...
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2answers
2k views

Does the amount of land needed to get the USA to zero-carbon electricity correspond to a small area of Texas?

After watching Elon Musk's presentation regarding the Tesla Powerwall, I had a question. On his diagram of the USA, he claims that a "tiny blue square" on the top of Texas that consists of solar ...
19
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2answers
11k views

Is electric muscle stimulation (EMS) training safe and effective?

Electric muscle stimulation (EMS) is touted as having the ability to strengthen muscles, reduce weight, minimize body fat and improve local blood circulation. During physical activity, your brain (...
25
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6answers
4k views

Do organisms have electromagnetic fields?

I doubt that organisms have electromagnetic (EM) fields. If we did have such a field, then we would certainly be susceptible to having electric currents induced in us by stronger EM fields. Or worse, ...
20
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2answers
1k views

Do Hubbard Electrometers (E-meters) detect emotion about past experiences?

I saw a table set up for "Free Stress Test" that someone was sitting at looking forlorn because everybody was walking past. I asked how it worked and she got me to sit down with these two cans ...
2
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1answer
782 views

Can a “special resistor” save a water heater tank from rust?

The Rheem water heaters say The Rheem Performance Platinum 50 Gal. Electric medium water heater provides an ample supply of hot water for households with 3 to 5 people. This unit comes with two ...
4
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0answers
234 views

Can StoreDot batteries be charged in two minutes?

CNET writes: StoreDot's system, which you can see in action in the video [at the link], uses a different chemical makeup to traditional batteries. We saw a modified Samsung Galaxy S5 go from 15 ...
33
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3answers
5k views

Can a television thrown in a bathtub kill someone?

In TV show or films, it seems that throwing any mains-powered electrical device (such as a television or radio) in a bathtub can kill the person in said bathtub. Can this happen? It appears to me ...
19
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2answers
3k views

Can WiFi waves cause headaches?

I saw there was a question about the harmfulness of WiFi waves, but i'd like to focus on the claims that they can cause headaches specifically; not the cancer-claims. Numerous people come up with ...
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0answers
82 views

Can WiFi cause health problems? [duplicate]

The following letter was delivered to every house in our village. It contains many claims about the health risks of WiFi, mobile phones and microwaves. It also claims several countries have band the ...
24
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2answers
37k views

Is it possible to pick up radio signals from dental fillings?

I recently heard this claim referred to on House M.D. when the titular character is experiencing phantom sounds, and the show appeared to give the idea some credibility. So I decided to look it up, ...
18
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1answer
3k views

Does tying a knot in a power cord provide any protection against lightning?

Some 20 years ago, when I was 11 or 12 years old, I attended a weekend 4-H camp about electricity. I recall one of the instructors there informing us that the cheapest way to protect our electronic ...
30
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1answer
2k views

Has anyone been caught using inductive coupling to steal power?

There are lots of references to the claim that people have stolen power through inductive coupling on the Internet: The most common claim it that it was a farmer somewhere that noticed electricity ...
12
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1answer
1k views

Subway magnetic fields and laptop hard drives

I just heard a story of a guy who took the subway to transport his company's off-site data back-ups for storage. When the time came for restore after a disaster, the data was corrupt and erased. ...
32
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2answers
36k views

Is it the current that kills you, not the voltage?

"It is not the voltage that kills you, it is the current" is an electricity safety tip I've heard many times. For example, here is an experienced electrician making the claim: The real danger with ...
25
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1answer
4k views

Is it possible to obtain current indirectly from power lines?

Can one obtain a sufficient amount of energy for a household's needs by indirect means (induction or otherwise) from nearby high-voltage power lines? Are there any documented cases of such attempts (...