PH 105-3 Exam 2 Solutions
Instructions: There are 8 problems below. Choose any 6 problems to solve. All questions have equal point values. Problem 1: Two blocks of masses M and 3M are placed on a horizontal, frictionless surface. A light spr
Chapter 28 - Sources of Magnetic Field!
1. Magnetic fields are created when charged particles move (have a velocity). The
magnetic field vector is indicated by the upper-case letter B. Older books sometimes
call the B-vector the magnetic induction becau
28. The next chapter is on magnetic fields and magnetic forces. Though this chapter does
not focus on the cause of magnetic fields, it is wise to jump ahead and read the first
section of Chapter 28. Fundamentally, magnetic fields are created
Chapter 31 - The RLC Circuit!
40. The second to last major topic in this course is the RLC circuit (Chapter 31). It seems
logical that after examining the RL circuit and the LC circuit that we place all three of
these electrical devices: a resistor, an
Chapter 29 - Electromagnetic Induction!
17. Next we investigate magnetic induction and Faradays Law in all its glory. Of all of
Maxwells equations, it was Faradays Law that brought about the greatest practical
applications of electricity and magnetism.
CONCISE SUMMARY OF THE IDEAS PRESENTED IN PHYSICS 2
Chapter 21: Charge, Coulombs Law, The Electric Field and Electric Dipoles
1. Electric charge is a property of matter first noticed and written about long ago. Around
600 B.C. the Greek philosopher Th
23. To begin Chapter 22, we use an analogy between light shining from a light bulb and
the electric field lines radiating out from a positively charged particle or sphere. Both
the intensity of the light and the strength of the electric field
1. To review, electric potential is potential energy per unit charge. Voltage is potential
difference. We now define two new quantities: current and current density. Current
relates to the flow of (positively) charged particles per unit time
Chapter 24: Capacitors, Capacitance and Dielectrics
53. When charged particles of one type (positive or negative) accumulate on a conducting
object, that object acquires an energy level higher (or lower for negative charge) than
an electrically neutral
Chapter 23: Electric Potential
37. We return to the idea of work as the dot product of force and displacement. By virtue
of the Coulomb force, the electric field will do positive work moving a positively
charged test particle in the direction of the fie
16. Direct current circuits are those in which the current flows in only one direction as a
function of time. In alternating current circuits, the current flows back and forth
usually quickly (60 times per second for normal household AC).
Chapter 30 - Inductance!
26. This week we examine inductance and inductors. Just as we defined capacitance for a
capacitor, we have inductance for an inductor. Capacitance measures how much
charge a capacitor can store. Loosely speaking, inductance meas