Why is it dangerous to place a hair dryer, radio, or other...

Why is it dangerous to place a hair dryer, radio, or other electric appliance that is plugged into a wall socket near a bathtub? (a) The water provides a conductive path for current, which heats the metal cover on the appliance and can cause burns. (b) If the appliance is accidentally knocked into the tub while a person is bathing, large currents could pass through the person’s low-resistance body because of the 120-V potential difference that powers the appliance. (c) There is no potential for danger, because electric appliances are grounded. (d) a and b

Why is it dangerous to place a hair dryer, radio, or other electric appliance that is plugged into a wall socket near a bathtub?
(a) The water provides a conductive path for current, which heats the metal cover on the appliance and can cause burns.
(b) If the appliance is accidentally knocked into the tub while a person is bathing, large currents could pass through the person’s low-resistance body because of the 120-V potential difference that powers the appliance.
(c) There is no potential for danger, because electric appliances are grounded.
(d) a and b

Key Concepts

Electrical Conductivity

This concept refers to the ability of a material, such as water (especially when it contains impurities), to allow the flow of electrical current. In electrical safety, understanding the conductive properties of water is essential because it can create unintended paths for current, leading to hazardous situations when electricity meets moisture.

Electrical Shock

Electrical shock occurs when a person becomes part of an electrical circuit, allowing current to pass through their body. Because the human body has relatively low resistance compared to many other materials, even a modest voltage can produce dangerous currents, which can lead to injury or fatality.

Potential Difference

Potential difference, or voltage, is the measure of electrical energy available to drive current through a circuit. In household settings, standard wall outlets provide a fixed voltage (for instance, 120 volts in many regions), which can become dangerous if that voltage is applied across a low-resistance path, like the human body in water.

Electrical Grounding

Electrical grounding is a safety mechanism designed to protect users from electrical shock by providing a low-resistance path to the earth in the event of a fault. Although proper grounding can mitigate some risks, it is not a substitute for keeping electrical devices away from hazardous environments such as bathtubs where water could create an unintended conductive path.

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