Final answer:
Touching someone who is being electrocuted can result in the current passing to you, potentially causing severe injury or death. It's crucial to use an insulator to assist them rather than direct contact.
Step-by-step explanation:
Touching someone who is being electrocuted can be extremely dangerous. The electrical current can pass from the victim to you, potentially leading to the same effects they're experiencing. These effects include a sensation at the point of contact, loss of voluntary muscle control, difficulty breathing, heart fibrillation, and even death. The severity of an electrical shock depends on several factors, such as the amount of current (I), the current's path through the body, the duration of the shock, and the frequency of the current.
The 'can't let go' effect is especially dangerous because the muscles that close the fingers are stronger than those that open them. Therefore, if you touch the person who is electrocuted, your hand might involuntarily close on them, thus prolonging the shock. In such scenarios, it is crucial to use an insulator to knock or blow the person's hand away from the source of electrocution, rather than trying to pull them away directly.