Electromagnetic Induction (Health and Lifestyle)

Electromagnetic Induction

When a current-carrying coil is placed in a magnetic field, there is force acting on the coil. In fact, an induced e.m.f or electromotive force is produced in a conductor which experiences a change of the magnetic field. An induced current flows through the conductor if it is connected in a closed circuit. This phenomenon is called electromagnetic induction.

Electromagnetic induction is the production of an electrical potential difference (or voltage) or an induced e.m.f. in a conductor or across a conductor situated in a changing magnetic flux or when there is a change in magnetic flux linked with the conductor.


Concept of Electromagnetic Induction

Faraday’s Law state that the strength of the induced e.m.f is proportional to the rate of change of the magnetic flux.

Faraday's Magnetic Field Induction Experiment

When Michael Faraday made his discovery of electromagnetic induction in 1831, he hypothesized that a changing magnetic field is necessary to induce a current in a nearby circuit. To test his hypothesis he made a coil by wrapping a paper cylinder with wire. He connected the coil to a galvanometer, and then moved a magnet back and forth inside the cylinder. When you move the magnet back and forth, notice that the galvanometer needle moves, indicating that a current is induced in the coil. Notice also that the needle immediately returns to zero when the magnet is not moving. Faraday confirmed that a moving magnetic field is necessary in order for electromagnetic induction to occur.

In this picture an ammeter is connected in the circuit of a conducting loop. When the bar magnet is moved closer to, or farther from the loop, an electromotive force (e.m.f) is induced in the loop. The ammeter indicates currents in different directions depending on the relative motion of magnet and loop. Notice that, when the magnet stops moving, the current returns to zero as indicated by the ammeter.

Lenz’s Law

The direction of the induced current is determined by Lenz’s Law which states that the induced current always flows in the direction in such a way that it opposes the change that produces it.

HEALTH AND LIFESTYLE

Magnetic Field Pattern (Health and Lifestyle)

Magnetic Field Pattern

The magnetic field patterns for two magnets with unlike poles facing each other

The magnetic field patterns for two magnets with like poles facing each other . At the neutral point the magnetic fields cancel out each other and the magnitude of resultant magnetic field is zero

The magnetic field patterns between two flat magnadur magnets.

HEALTH AND LIFESTYLE

Magnetic Forces (Health and Life Style)

Magnetic Force

The paper clips are attracted to both magnetic poles of a magnet.

If you suspend a bar magnet by a string from its centre, the magnet points in a north-south direction.

Like poles repel each other.

Unlike poles attract each other.

Concept of Magnetic Field

A magnet produces a magnetic field in the space around it. If another magnet is placed in the field, it experienced a magnetic force. We can represent a magnetic field with magnetic field lines. Magnetic field lines run from the magnetic north pole to the magnetic South Pole.

The Density of magnetic field lines represents by magnitude of magnetic field
stronger field - field lines are closer together
weaker field - field lines are further apart

Visualizing Magnetic Field

We can visualize magnetic field lines using iron filings.

We can also visualize magnetic field lines using a number of plotting compasses.Needle of a compass experience the magnetic forces.

HEALTH AND LIFESTYLE

The Best Way to Prevent Swine Flu (Health and Lifestyle)

H1N1 SYMPTOMS

Nowadays, Swine flu is fast becoming a hot topic in the world. Swine flu or H1N1 is no different to normal flu, just more infectious. Whether you choose to call it Influenza A, Swine Influenza, or Swine Flu, you probably have some questions about the risks of you and your family. Swine flu is dreadful, and it can be dangerous if somebody have a lung problem, obesity, and pregnancy.

The more people talk about this issue and the more cases that pop up in communities close to home. The questions and answers will probably change over the course of the next few weeks as health authorities learn more about the different strains of Swine Flu that are affecting many countries. Prevention will be the solution to defeating swine flu and here are some techniques to help do that.

You can catch Swine Flu or any flu virus if you are standing within three feet of an uncovered cough or sneeze and droplets make contact with you. All flues are spread by droplets that spray out as a person sneezes or coughs. So, learn about the symptoms of swine flu and avoid anyone who has the symptoms.

Wash your hands often to protect against germ free. According to the Center for Disease Control, the best way to do that is to wash them systematically and often with anti-bacterial soap. If soap is unavailable use an alcohol based hand sanitizing gel.

Keep your body in good health and stop eating so much junk food. Make sure you are getting enough trace minerals because without trace minerals, your body can catch anything quickly. Throughout trace minerals, you have more protection, very high amount of protection.

In the end, by combining the following steps it can help to decrease the possibility of transmission. These actions include covering coughs, frequent hand-washing, having ill persons stay home except to seek medical care, and minimize contact with others in the household. If used correctly, facemasks and respirators may help reduce the risk of getting influenza, but they should be used along with other preventive measures, such as avoiding close contact and maintaining good hand hygiene.

SWINE FLU SYMPTOMS

How to Identify the Symptoms of Swine Flu H1N1 (Health and Lifestyle)

H1N1 SYMPTOMS

By Jennifer Kirkman

The first thing you may notice with the Swine Flu symptoms is that you will have a fever.Medical professionals have named the word fever, as pyrexia. A low grade fever may not necessarily mean that you do indeed, have Swine Flu. But if you are having some of these other symptoms in your body that I will continue to describe below, this could indicate the onset of the illness. Did you realize that part of the brain, the hypothalamus, is the temperature control system of our bodies? Therefore, it may be accompanied by chills you may have, along with very sore bones/and or muscles. Also, when the blood vessels vessels may be effected as well. This in turn, means that the heart may beat quicker then normal.

The second symptom that may stand out is coughing. The cough you are having may be really deep into the chest or not very bothersome. I have rwad that this Swine Flu seems to favor the lungs in a person. Along with a cough, you may also be experiencing a throat that feels as though you have a throat infection or strep. If you are feeling as though you have a throat accompanied by a cough, see your doctor for a throat and chest examination to determine exactly what is going on.

A third symptom you may be experiencing is a nauseated feeling and unable to hold your food down very well. You may also feel like running to the bathroom with diarrheal symptoms that can be very severe for some people and mild for others.

The fourth symptom you may or may not experience with Swine Flu is head pain that feels more like a migraine type of a headache. This again, is brought on by the blood vessels that are tight due to this illness. Since your body is working hard to rid itself of the Swine infection, this is a common part of the illness.

The fifth prominent symptom you may be feeling quite intensely is an exhaustion all over the body or an unrelenting fatigue. This fatigue may cause you the inability to function at all, along with feeling like just sleeping all the time.

And finally,the sixth symptom you may have all the time is vertigo. Vertigo is the medical terminology for a dizzy feeling in the body. If you don not usually have vertigo for another medical reason, it is definitely something you need to look into quickly, and especially if you are having these other classic symptomatologies I have mentioned here.

Jennifer Kirkman is the owner of many websites, two of the main ones are http://www.diabetesandrelatedhealthissues.com, and also http://www.dietplansandweightloss.com Visit these sites for much more information on diabetes and diabetes problems, and proper nutrition.

Article Source: http://EzineArticles.com/?expert=Jennifer_Kirkman
http://EzineArticles.com/?How-to-Identify-the-Symptoms-of-Swine-Flu-H1N1&id=2382794

H1N1 SYMPTOMS

Cancer and Lifestyle Changes - Are You Brave Enough? (Health and Lifestyle)

HEALTH AND LIFESTYLE

By Rita Goldman

One of the reasons that the number of cancer suffers has increased is the fact that many more people undergo routine screening and early detection has increased the number of sufferers. Health care workers estimate that the USA has ten million cancer sufferers, which represents a figure between three and four percent of the population. However it is expected that in the next ten years the proportion will increase as more people are getting older and more people survive cancer.

However, it does not alter the fact that cancer survivors have a greater risk for developing serious conditions such as heart disease, diabetes and osteoporosis as well as secondary cancers. This is likely to be both a result of lifestyle and genetic risk factors. As a general rule, physical exercise, eating plenty of fresh fruit and vegetables and reducing a fat and sugar intake will offer significant protection against most serious conditions. Interestingly recent research has indicated that increasing the amount of exercise reduce the risk of secondary breast cancers. A low fat diet is widely regarded as a preventative measure against secondary breast cancer in post menopausal women.

Yet the fact is that most cancer patients do not significantly alter their lifestyle after being cured. Most of the breast cancer risk factors described is related to a woman's exposure to estrogens including early menstruation, late menopause which increases the total amount of monthly cycles. Risks are reduced when a woman has an early first birth and an early menopause. The relationship of body fatness to breast cancer risk is ambiguous; it is probable that post menopausal breast cancer has a direct link with both weight gain especially abdominal weight gain and also a lack of physical activity. There is a suggestion that there is an increased risk of breast cancer for women who smoke in early adolescence.

In 2005 by Holmes MD, Chen WY, Feskanich D, Kroenke CH, Colditz GA studied 2987 women diagnosed with stage I, II or III breast cancer they found that an increase in exercise reduced the amount of deaths from cancer. The most improvement was found in those women that walked for between three and five hours a week. Results were positive from a study by Pierce JP, Stefanick ML, Flatt SW et al (2007) entitled Greater survival after breast cancer in physically active women with high vegetable-fruit intake regardless of obesity; indicated that the combination of consuming at least five servings of fresh vegetables or fruits and increasing their physical activity to at least half an hour a day for six days a week increased the number of women who survived estrogen positive receptor tumors. However other studies have not reported a difference.

In women with estrogen receptor positive breast cancer, studies have shown a positive link between treatment failure and high intakes of fat, both saturated fat and polyunsaturated fat. The fresh start trial studied newly diagnosed breast and prostate cancer patients, and it found that directly mailing patients encouraged a healthy lifestyle including eating less fat, more fruit and vegetables, than other conventional methods. Although this is in tune with psychological cognitive behavioral patterns, it needs more research to observe results (Demark-Wahnefried W, Clipp EC, Lipkus IM et al (2007). More research is needed because it would indicate the fact that newly diagnosed cancer patients have sufficient fear to make meaningful changes in their way of life it is no means certain that all health care staff promote such changes.

As isolated as you may feel right now, you are not alone. Cancer diagnosis is no longer the end of the story. Cancer survivors prove every day that this can be the beginning of a whole new positive chapter in your life. Join our unique community of cancer survivors to be right
now and receive a FREE report on Cancer Survivor's tips.

Article Source: http://EzineArticles.com/?expert=Rita_Goldman
http://EzineArticles.com/?Cancer-and-Lifestyle-Changes---Are-You-Brave-Enough?&id=2799202

HEALTH AND LIFESTYLE