It is safe to handle the metal ends of a wire connected to 10 or 20 Volts because dry skin has a very high resistance. Group of answer choices True False
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The effect of electricity on human body is determined not by the voltage but by the current that flows through our body (which is why it is safe to touch a van de Graaff generator at 100,000 volts but not safe to stick your finger into a 110-volt wall socket). Match each level of electrical current with the effect of the electrical current on our body. Hint 1 mA 5 mA 10 mA 50 mA 100 mA a. maximum harmless current b. threshold of sensation c. onset of pain d. cannot let go for the duration of shock because of muscle contraction e. heart rhythm may be disrupted; often fatal Having said this, higher voltage does allow more current to be pushed through our body, according to Ohm's Law. So what makes a high-voltage van de Graaff generator safe to touch is the fact that it has a very low current limit (it quickly discharges on touch and does not maintain its high voltage), not that it has a high-voltage.
Ivan K.
A person notices a mild shock if the current along a path through the thumb and index finger exceeds 80 µA. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 4.0 ✕ 105 and a wet-skin resistance of 1500 . dry skin V wet skin V
Madhur L.
The effect of electricity on human body is determined not by the voltage but by the current that flows through our body (which is why it is safe to touch a van de Graaff generator at 100,000 volts but not safe to stick your finger into a 110-volt wall socket). Match each level of electrical current with the effect of the electrical current on our body. 1 mA 5 mA 10 mA 50 mA 100 mA a. threshold of sensation b. heart rhythm may be disrupted; often fatal c. cannot let go for the duration of shock because of muscle contraction d. maximum harmless current e. onset of pain Having said this, higher voltage does allow more current to be pushed through our body, according to Ohm's Law. So what makes a high-voltage van de Graaff generator safe to touch is the fact that it has a very low current limit (it quickly discharges on touch and does not maintain its high voltage), not that it has a high-voltage.
Sri K.
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