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Why is it always emphasised NOT to touch any electric switch board with wet hands?
Water can erode the switchboard.
Combination of water and our body is a good conductor of electricity.
Wet hands can fade away the colour coat of the switchboard.
Wet hands might slip from the switch.
Combination of water and our body is a good conductor of electricity.
Touching an electric switch with wet hands is dangerous because water significantly reduces the electrical resistance of the skin. This facilitates the flow of high-voltage electric current through the body, which can lead to severe electric shocks.
Touching an electric switch with wet hands is dangerous because water significantly reduces the electrical resistance of the skin. This facilitates the flow of high-voltage electric current through the body, which can lead to severe electric shocks.
Think of electrical resistance like a narrow gate that limits the flow of people; water acts like a lubricant that removes the gate, allowing electricity to rush through your body without restriction.
WET: Water Enables Transmission.
I=RVтАЛ тАФ Ohm's Law where I is current, V is voltage, and R is resistance
Human skin generally acts as an insulator, but when wet, it becomes a conductor due to the presence of dissolved ions in water (impurities). By Ohm's Law, I=RVтАЛ, where R is resistance; as R decreases significantly when wet, the current I flowing through the body increases drastically for a given voltage V.
Pure water is a poor conductor, but tap water contains dissolved salts and ions that conduct electricity.
The human body is composed of approximately 60% water, making it an effective conductor once the skin's insulating layer is bypassed.
Electric current causes muscle contraction, which can prevent a person from letting go of the live source.
Safety precautions for electrical appliances in bathrooms
Installation of Ground Fault Circuit Interrupters (GFCI)
Dry skin resistance can be as high as 100,000╬й, whereas wet skin resistance can drop to 1,000╬й.
Option A is incorrect because water does not possess corrosive properties strong enough to damage switchboards instantly. Option C is incorrect as paint durability is unrelated to electrical hazards. Option D is incorrect because while slipping is possible, it is not the primary cause of electrical danger.
B is correct тАФ Wet hands decrease the electrical resistance of the human body, creating an easy path for current to flow through the body, resulting in a dangerous electric shock.
Always remember that in electricity problems, if the resistance of a circuit component or the human body decreases, the current drawn for a constant voltage increases, which is why safety protocols focus on maintaining high resistance.
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