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Homework #4 Physics 112-1 F12 Page 1 of 1 Homework #4 Chapter 24: Electric Current P 416 #4. Good conductors of electricity are often good conductors of heat. Why? #5: Why can current persist in a superconductor with no applied voltage? #34: You touch a defective appliance while standing on the ground and you feel the tingle of a 2.5mA current. What’s your resistance, assuming you’re touching the hot side of the 120V household wiring? Chapter 25: Electric Circuits P 435 #1: Are household electrical outlets connected in series or in parallel? How do you know? #26: What is the current through the 3Ω resistor in the circuit shown below: Page 436: #43: Your company is designing a battery-based backup power source, and your job is to assess its safety. You know that under damp or sweaty conditions, the resistance between two points of unbroken skin on the human body can be as low as 500Ω. Your product uses a 72V battery whose internal resistance is 100Ω. Is it capable of passing a fatal 100mA through a damp human body?
