A person notices a mild shock if the current along a path through the thumb and

Question

A person notices a mild shock if the current along a path through the thumb and index finger exceeds 72 mu A. Compare the maximum possible voltage without shock across the thumb and index finger with a dry-skin resistance of 5.0 x 105 ohm and a wet-skin resistance of 1500 ohm. dry skin V wet skin V The power supplied to a typical black-and-white television set is 92 W when the set is connected to 120 V. How much electrical energy does this set consume in 1 hour? A color television set draws about 2.7 A when connected to 120 V. How much time is required for it to consume the same energy as the black-and-white model consumes in 1 hour? min

Explanation / Answer

1)

dry : V = I R = 72e-6*5e5 = 36 V

wet: V = I R = 72e-6*1500 = 0.108 V

2)

2-a)

E = P t = 92 *60*60 = 331200 J

2-b)

P = I V = 120*2.7 = 324 W

t = E/P = 331200/324 = 1022 s = 17.0 min

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.