Suppose that a person\'s body resistance is 950 (moist skin). Part A What curren

Question

Suppose that a person's body resistance is 950 (moist skin).

Part A

What current passes through the body when the person accidentally is connected to 120 V?

Express your answer to two significant figures and include the appropriate units.

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Correct

Part B

If there is an alternative path to ground whose resistance is 33 , what current passes through the person?

Express your answer to two significant figures and include the appropriate units.

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Part C

If the voltage source can produce at most 1.7 A , how much current passes through the person in the prevous case?

Express your answer to two significant figures and include the appropriate units.

Explanation / Answer

Given

R = 950 ohms

V = 120 volts

A) Use Ohm's law

V = I*R

==> I = V/R

= 120/950

= 0.126 A

B) same. i.e 0.126 A

current through the body, I = 120/950 = 0.126 A

current through the other resistance, I = 120/33 = 3.64 A

C)

Current through the body = I*33/(950+33)

= 1.7*33/(950 + 33)

= 0.057 A

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