EFFECT OF ELECTRICAL QUANTITIES ON HUMAN BODY

WHAT IS THE EFFECT OF DIFFERENT ELECTRICAL QUANTITIES ON HUMAN BODY?

PRECAUTIONS AT THE TIME OF ELECTRICAL WORK?

Effect of dangerous currents on human body: The main reason of electric shock is the electric current that flows through human body.The severity of electric shock depends upon two given below factors:

1. Time of contact: The more is the time of contact of the body with electric current.The more severity of electric shock.
2. Nature of current (AC or DC): The AC current is more dangerous than DC for human body.

If we know the working voltage and resistance of human body.Then the value of current flow through human body can be find by the OHM'S Law.

Current flow through the body = Working voltage/resistance of the body

Value of current and its severity on human body:

1. 1 to 8 mA: In the value of current man can be bear.But he feels the electric shock and it is not dangerous.
2. 8 to 15 mA: In this value of current body receives painful shock, but the severity of shock depends upon the health.
3. 15 to 20 mA: In this value of current body receives painful shock and body cannot control muscle nerve.So, human body cannot bear this value of current.
4. 20 to 50 mA: In this value of current, contraction of all muscle nerve started.So, human feels difficult in breathing.
5. 50 to 100 mA: In this value of current, due to contraction of muscle nerve, human feels difficult in breathing and heart beat increase.So, in this condition death may be possible.
6. Above 100 mA: In this value of current body burns, due to contraction of muscle nerve, human feel difficult in breathing and heart beat increase.So, in this condition death may be possible.

Electric shock

The Effect of electric current on human body is described below:

1. Due to electric shock body becomes weak and feel laziness.
2. The human may be become impotent, due to damage of nerve system.
3. The human may be become fully or partially handicapped.
4. Due to burning, the face become ugly.
5. The human may be become deaf.
6. The human may be become blind.
7. Any parts of body may be break.
8. Full body may be burned and converted into ash.

EFFECT OF AC FREQUENCY ON HUMAN BODY:

We know that the time period of alternating current is inversely proportional to frequency.

T = 1/f

Means lower the frequency more the time period of alternating current and vice-verse.Thus time of one cycle of alternating current is more and at time of electric shock it flow through the human body long time as comparison to high frequency AC and the peak value of AC flow through the body for long time and will harm the body.Thus lower frequency harm the body severely as comparison to high frequency. 

ELECTRIC RESISTANCE OF HUMAN BODY:

The value of resistance of human body depends upon two factors.

1. Dryness
2. Wetness

The value of resistance of body in different condition is given below:

1. Fully wet body = 1 KΩ
2. Partially wet body = 5 KΩ
3. Average dry body = 50 KΩ
4. Fully dry body = 100 KΩ

According to OHM'S Law, the greater the value of resistance the less is the current.So,wet body feel more electric shock as comparison to dry body.

EFFECT OF DANGEROUS VOLTAGE ON HUMAN BODY:

We know that current is more dangerous than voltage for human body.We can find the dangerous voltage according to OHM'S Law.

Dangerous voltage for human body = Current*resistance of body

The value of dangerous voltage for children is 24V and for adults is 60V.

PRECAUTIONS: We know that electricity is very dangerous for human life.So, at the time of electric work the given below points keep in mind.

1. At the time of work done, if you feel uncomfortable or may be a small injury happens.Than take rest for some time.
2. If a man comes in contact with live wire.Than take a dry wood stick to break the contact between human and live wire.It is to good before doing this you stood on a wood or rubber sheet.
3. Every time should be alert at the time of work.
4. At the time of work do not be hasty.
5. At the time of work, working a zone should be earthed.
6. The communication should be good.
7. At the time of work safety dress is necessary.
8. If you have not knowledge about the work than doing not do it.
9. At the time of work do not talk with any person and fully focused on work.
10. Always used insulated tools at the time of work.

Conclusion: The conclusion is that electricity is very dangerous for human life.But it can be avoided by taking a little care.So, at the time of work follow the precaution that saves our life from electricity shock.