How Does The Muscle Of The Body Determine The Current
When muscles of the body are exposed to electric shock, the muscles contract, the heart muscle goes into fibrillation electric shock can result in death AC is much more dangerous than DC
An electrical shock is experienced when a person become part of an electric circuit. As a result, current enters at one point and leaves by another. The severity of the shock is determined by three main factors:
The amount of current flowing through the body;
The path of the current through the body. The great majority of electric shocks enter through the arm and exit through the legs. As a result the current passes through the chest and affects the organs within; and
The length of time the current passes through the body.
Other factors that may affect …show more content…
Typically the human body has a resistance ~ 500,000 ohm (500 kΩ) and this is primarily the resistance of our skin when dry and unbroken. When the skin is wet and has dissolved salts from our body, however, the resistance can fall to ~ 1000 Ω or even lower. The body’s internal resistance is even lower at ~ 100-500 Ω depending on the pathway.
What happens if you grip a live current source?
The muscles in the arm contract and you cannot let go; the muscles controlling the diaphragm cause it to clamp and you cannot breathe; the heart muscles go into fibrillation 1 and stops effective beating. Eventually it will tire and stop altogether; death occurs. The longer the exposure to the current, the more likely that death will occur. The lethal limits can fall to as low as 50-100 mA range.
1 Fibrillation means that the heart beats with a weak or erratic rhythm and does not pump effectively. Fibrillation can be stopped by a controlled electric shock from a defibrillator. Whereas Cardiopulmonary Resuscitation a can restart a stopped heart; a fibrillating heart seldom can be restarted.
Humans and animals are most susceptible to frequencies in the range of 50-60 Hz. Humans can withstand 10 times as much DC current as the equivalent AC current at 50Hz (or
An electrical shock is experienced when a person become part of an electric circuit. As a result, current enters at one point and leaves by another. The severity of the shock is determined by three main factors:
The amount of current flowing through the body;
The path of the current through the body. The great majority of electric shocks enter through the arm and exit through the legs. As a result the current passes through the chest and affects the organs within; and
The length of time the current passes through the body.
Other factors that may affect …show more content…
Typically the human body has a resistance ~ 500,000 ohm (500 kΩ) and this is primarily the resistance of our skin when dry and unbroken. When the skin is wet and has dissolved salts from our body, however, the resistance can fall to ~ 1000 Ω or even lower. The body’s internal resistance is even lower at ~ 100-500 Ω depending on the pathway.
What happens if you grip a live current source?
The muscles in the arm contract and you cannot let go; the muscles controlling the diaphragm cause it to clamp and you cannot breathe; the heart muscles go into fibrillation 1 and stops effective beating. Eventually it will tire and stop altogether; death occurs. The longer the exposure to the current, the more likely that death will occur. The lethal limits can fall to as low as 50-100 mA range.
1 Fibrillation means that the heart beats with a weak or erratic rhythm and does not pump effectively. Fibrillation can be stopped by a controlled electric shock from a defibrillator. Whereas Cardiopulmonary Resuscitation a can restart a stopped heart; a fibrillating heart seldom can be restarted.
Humans and animals are most susceptible to frequencies in the range of 50-60 Hz. Humans can withstand 10 times as much DC current as the equivalent AC current at 50Hz (or