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Q.

The average bulk resistivity of the human body (apart from the surface resistance of the skin) is about 50-m. The conducting path between the hands can be represented approximately as a cylinder 1.6 m long and 0.1 m diameter. The skin resistance may be made negligible by soaking the hands in salt water. A lethal shock current needed is 100 mA. Note that a small amount of potential difference could be fatal if the skin is damp.

The power dissipated in the body is

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a

4.10W

b

3.100W

c

2.0.1W

d

1.1 W

answer is D.

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The average bulk resistivity of the human body (apart from the surface resistance of the skin) is about 50-m. The conducting path between the hands can be represented approximately as a cylinder 1.6 m long and 0.1 m diameter. The skin resistance may be made negligible by soaking the hands in salt water. A lethal shock current needed is 100 mA. Note that a small amount of potential difference could be fatal if the skin is damp.The power dissipated in the body is