Question

What can a shock of more than 4 A do to a person?

1) Cause severe burns
2) Cause muscle contractions
3) Cause cardiac arrest
4) All of the above

Answer 1

A shock exceeding 4 amperes can cause severe burns, muscle contractions, and cardiac arrest including ventricular fibrillation, which can be fatal.

Step-by-step explanation:

A shock of more than 4 amperes (A) can be extremely dangerous and have severe effects on the human body. Such a high level of electrical current can cause a range of injuries including severe burns, depending on the concentration of the current.

Muscle contractions can be so forceful that they cause an individual to be unable to release the source of electricity, and in the chest area, such contractions can impair breathing.

Moreover, electrical current can disrupt the heart's normal rhythm, potentially leading to cardiac arrest as the heart becomes incapable of pumping effectively due to ventricular fibrillation, a condition that can be fatal.

Therefore, when exposed to a current of this magnitude, all the mentioned effects: severe burns, muscle contractions, and cardiac arrest can occur.

Hence, the correct response to the student's question is option 4) All of the above.