Electrical Engineering World
Answer:
Current is usually more fatal than voltage. The severity of an electric shock depends on the amount of current passing through the body, with higher currents being more dangerous. Voltage, on the other hand, determines the potential for current flow.
Reasoning:
While voltage represents the force or pressure pushing electrons, it is the current, measured in amperes (A), that poses the greatest risk to human life. The human body’s resistance to electric current (measured in ohms) determines the amount of current passing through it based on Ohm’s Law (V=IR). Even low voltages can be lethal if they result in high currents passing through the body. It’s the current that disrupts the normal functioning of the body’s cells and vital organs, including the heart.
FAQs:
Q: Why is current more fatal than voltage?
A: Current is more directly responsible for the physiological effects of an electric shock, especially at high levels.
Q: Can low voltage be lethal
A: Yes, if it results in a high current passing through the body, even low voltages can be lethal.
Q: What determines the severity of an electric shock?
A: The amount of current passing through the body, influenced by both voltage and resistance.
Q: Is voltage irrelevant in electric shock severity?
A: No, voltage determines the potential for current flow, but it’s the current that causes harm.
Q: What is Ohm’s Law?
A: Ohm’s Law (V=IR) relates voltage, current, and resistance in an electrical circuit.
Q: How does the body’s resistance affect electric shock?
A: Lower resistance results in higher current flow, increasing the severity of an electric shock.
Q: Can high voltage alone cause harm?
A: High voltage can be dangerous, but it’s the resulting current that poses the greatest risk.
Q: Why is electrical resistance important in safety?
A: Higher resistance reduces current flow and minimizes the risk of electric shock.
Q: What is the role of insulation in preventing electric shock?
A: Insulation reduces the likelihood of direct contact with live conductors, minimizing the risk of shock.
Q: Are DC and AC currents equally dangerous?
A: The physiological effects are similar, but AC is often considered more hazardous at lower voltages due to its ability to induce involuntary muscle contractions.