PHY 101 Week 5 Individual Assignment Texbook Exercises

PHY 101 Week 5 Individual Assignment Texbook Exercises Recent

Chapter 22: 2/6

#2: Suppose that the changes attracting each other in the preceding problem have equal magnitude. Rearrange Coulomb’s law and show that the magnitude of each charge is 2.8×10^-6C (2.8 microcoulombs).

Chapter 23: 2/4

#2: The wattage marked on a light bulb is not an inherent property of the bulb, but depends on the voltage to which it is connected, usually 110 or 120v. How many amperes flow through a 60-w bulb connected in a 120-v circuit?

#4: Using the formula power=current x voltage, find the current drawn by a 1200-w toaster connected to 120 v. Then using the method from the previous problem, show that the resistance of the toaster is 12ohms

Chapter 24 Exercise 10, 18, 24

#10: What is different about the magnetic poles of common refrigerator magnets and those of common bar magnets

#18: What is the net magnetic force on a compass needle? By what mechanism does a compass needle align with a magnetic field

#24: Magnet A has twice the magnetic field strength of magnet B ( at equal distance) and , at a certain distance, it pulls on magnet B with a force of 50 N. With how much force then, does Magnet B pull on Magnet A?

Chapter 25: 2/4

#2: An ideal transformer has 50 turns in its primary and 250 turns in its secondary. 12 V ac is connected to the primary

#4: Neon signs require about 12,000 v for their operation. What should be the ratio of the number of loops in the secondary to the number of loops in primary for a neon-sign transformer that operates from 120-v lines?

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