Question

Why should you be more careful when using the electric supply from the mains compared to when working with an electric cell

A) Because the electric supply from the mains has a higher voltage than an electric cell.
B) Due to the fact that an electric cell poses no electrical hazards.
C) Because the mains supply is direct current, which is more dangerous than the alternating current from an electric cell.
D) As the electric cell is more likely to cause short circuits.
E) Because the mains supply is only used in industrial settings and not in everyday applications.

Answer 1

Mains electricity poses higher risks due to its higher voltage, which leads to greater electrical shock and thermal hazard potential. AC from the mains can be more harmful than DC from an electric cell. Hence, option (A) is correct.

Step-by-step explanation:

You should be more careful when using the electric supply from the mains compared to when working with an electric cell primarily because the electric supply from the mains has a higher voltage than an electric cell. This higher voltage increases the risk of electrical shock and thermal hazards, such as fires, from overheating due to short circuits or wire overloads.

Additionally, the main supply is alternating current (AC), which can be more harmful than the direct current (DC) from an electric cell, contrary to the misconception that DC is more dangerous. AC currents can cause involuntary muscle contractions and are more likely to disrupt the rhythm of the heart, leading to potentially fatal outcomes.