Question

Some devices often used in bathrooms, such as hairdryers, often have safety messages saying "Do not use when the bathtub or basin is full of water." Why is this so?

a) Water increases electrical conductivity.

b) Water causes a short circuit.

c) Water enhances device performance.

d) Water reduces electrical resistance.

Answer 1

Hairdryers and other electrical devices pose a risk of electric shock if used near water because water conducts electricity well when impurities are present, reducing electrical resistance and increasing conductivity.

Step-by-step explanation:

Devices such as hairdryers carry safety messages warning against their use near full bathtubs or basins due to the risk of electric shock. The correct answers to why this is advised are a) Water increases electrical conductivity and d) Water reduces electrical resistance.

Water is a good conductor of electricity, especially when it contains common impurities like salts. If a hairdryer or any electrical device falls into water, it can create a path for the electric current to flow through the water and potentially through a human body if someone is in contact with the water. This can lead to electric shock, which can be dangerous or fatal. Using such devices away from water is a safety measure to prevent accidental electrocution.