Two large parallel copper plates are   6 . 00   c m apart and one of the plates carries negative charges with surface charge density – σ and another positive charges with surface charge σ as depicted in Fig. 2. An electron is released from the negative plate at the same time that a proton is released from the positive plate. (a) Neglect the force of the particles on each other and find their distance from the positive plate when they pass each other. After the electron penetrates the positive plate without resistance, it enters a region with a uniform magnetic field directed in the negative z  direction and exits 0 . 630   μ C later at point A. The boundary of the uniform magnetic region is shown in Fig. 2. (b) What is the magnitude of the magnetic field in the magnetic region, and (c) what is the magnitude of the electric field between the two copper plates? If the magnitude of the electric field between two copper plates are doubled and the magnitude of the magnetic field remains the same as the one determined in (b), (d) what are the x and y components of the velocity of the electron when it exits the magnetic region? If the magnitude of the electric field remains the same as the one determined in (c) and the magnitude of the magnetic field changes, (e) what is the magnitude of the magnetic field if the electron exits the magnetic region with the same x and y components of velocity? (Note: The mass of an electron is 9 . 11 × 10 – 31   k g , the charge of an electron is – 1 . 60 × 10 – 19   C ; the mass of a proton is 1 . 67 × 10 – 27   k g , the charge of a proton is 1 . 60 × 10 – 19   k g .) f_q18_phys2426.v02.docx

What is a “Leave It to Beaver” family? (6 points)

About ______ of adults with disabilities report having depression.

There is no current in the circuit shown in the figure below until the switch is closed. The current through the 40 . 0   Ω resistor the instant ( t = 0 ) after the switch is closed is either [1] 5 . 00   A or [2] 15 . 0   A , and the current through the 40 . 0   Ω resistor after the switch has been closed a long time is either [3] 0 . 00   A or [4] 15 . 0   A . Which combination of the above choices is correct? f_q13_phys2426.v02.docx

It is required that I follow the MSU honor code.

When will men and women be equal? (6 points)

When a single-lens camera is focused on a distant object, the lens-to-film distance is found to be 40.0 mm.                    . To focus on an object 0.540 m in front of the lens, the film-to-lens distance must be (Note: 1 mm=10-3 m):

Two large parallel plates carry positive charge of equal magnitude that is distributed uniformly over their inner surfaces. Rank the points 1 through 5 according to the magnitude of the electric field at the points, least to greatest. f_q4_phys2426.v02.docx

The rectangular metal tank shown is filled with an unknown liquid. The observer, whose eye is level with the top of the tank, can just see corner P. The index of refraction of this liquid is: f_q16_phys2426.v02.docx

Capacitors A and B are identical. Capacitor A is charged so it stores 8 J of energy and capacitor B is uncharged. The capacitors are then connected in parallel. The total stored energy in the capacitors is now: