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Free Exam: Session5_25HKISOHR_AdvPhysics_SS

Number of Questions in Test: 25
Number of Questions in Preview: 5
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Question 1
[size=4]Currents of approximately 0.06 A can be potentially fatal. Currents in that range can make the heart fibrillate (beat in an uncontrolled manner). The resistance of a dry human body can be approximately 100 k Ω.[/size]



[size=4]What voltage can cause 0.06 A through a dry human body?[/size]
Type: Multiple choice
Points: 1
Randomize answers: No
Question 2
[size=4]Currents of approximately 0.06 A can be potentially fatal. Currents in that range can make the heart fibrillate (beat in an uncontrolled manner). The resistance of a dry human body can be approximately 100 k Ω.



When a human body is wet, the resistance can fall to 100 Ω. What voltage can cause harm to a wet body?[/size]
Type: Multiple choice
Points: 1
Randomize answers: No
Question 3
[size=4]A carbon resistor at room temperature (20 0C) is attached to a 9.00-V battery, and the current measured through the resistor is 3.00 mA. If the temperature of the resistor is increased to 60 0C by heating the resistor, what is the current through the resistor? (The temperature coefficient for carbon is α = -0.0005.)[/size]
Type: Multiple choice
Points: 1
Randomize answers: No
Question 4
[size=4]A resistor rated at 250 kΩ is connected across two D cell batteries (each 1.50 V) in series, with a total voltage of 3.00 V. The manufacturer advertises that their resistors are within 5% of the rated value. What are the possible minimum current and maximum current through the resistor?[/size]
Type: Multiple choice
Points: 1
Randomize answers: No
Question 5
[size=4]A resistor is placed in a circuit with an adjustable voltage source. The voltage across and the current through the resistor and the measurements are shown below. Estimate the resistance of the resistor.[/size]

[size=4][cmimg]0/12003026_NS20E8DQ.png[/cmimg]

[/size]
Type: Multiple choice
Points: 1
Randomize answers: No
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