{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Exam 1 Spring 2001

# Exam 1 Spring 2001 - Physics 171.102 Exam 1 Prof Barnett...

This preview shows pages 1–2. Sign up to view the full content.

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Physics 171.102 Exam 1 March 13, 2001 Prof. Barnett Write your TA’s name and your name on each blue book. Write everything in ink. You may utilize material written on both sides of ONE 3”X5” index. card. 6,, = 8.85 x 10-1202/(Nm2) 1. Consider the adjacent circuit made of a 3.0 volt battery, two capacitors with Cl 2 1 0f and C2 = 2 ,uf, three resistors with R1 2 59, R2 = 10 Q, and R3 = 30 Q, and a switch. Initially, the switch is open so the battery is disconnected from the rest of the circuit. At t=0 the switch is closed connecting the battery to the circuit. A) (5 pts) Immediately after the switch is closed, ife. at t=0, what is the total energy stored on each of the two capacitors?. B) (5 pts) Immediately after the switch is closed, i.e. at t=0, what is the current ﬂowing through resistor R2? C) (5 pts) Immediately after the switch is closed, i.e. at t=0, what is the total power being dissipated in resistor R2? D) (5 pts) A long time after the switch is closed, i.e. at t=oo, what is the total energy stored on each of the two capacitors? E) (5 pts) A long time after the switch is closed, i.e. at t=oo, what is the current ﬂowing through resistor R2? G) (5 pts) A long time after the switch is closed, i.e. at t=oo, what is the total power being dissipated in resistor R2? 2. A graph of the electric potential as a function of x is given in the adjacent plot. The potential does not depend upon y or z. A) (10 pts) Find the electric ﬁeld, E(\$, y, Z), everywhere in this domain of X. B) (5 pts) Make an accurate plot of the electric field for this domain of x. :‘140 0'30 02 - , ., __+ . — . — . — . 0 -o.1o 0.10 0.20 0.30 0.40 C) (20 pts) Describe in words what charge 5 —50 W“) distribution could create this electric E [ ﬁeld and evaluate quantitatively the l ~100_ appropriate charge densities. 3. Particles with charge ( = 40—17 coulombs ), mass ( m = 10.27 kg) and velocity ( r7 = 2 X 106 m/sec 2' ) enter a region with a is uniform electric ﬁeld of E = 2 x 1025' N/C. E 2 2 x 1025 we ____________ l A) (10 pts) Draw a sketch of the particle’s 27 = 2 X 106 m/sec i hyperbola, ellipse, circle, parabola, etc.) and ﬁnd the functional form of y and z for the trajectory trajectory, name the trajectory (e.g. straight line, 1 versus x (e.g. 2(22) : ”13123: + 3). B) (10 pts) Now add a uniform magnetic ﬁeld, E, to‘the region with this E ﬁeld in such a way that the particle travels in a straight line. Evaluate B. l C) (15 pts) Now remove the original E ﬁeld so the particle is traveling only in the B" ﬁeld. Draw a sketch of the particle’s trajectory, name the trajectory (e.g. straight line, hy- perbola, ellipse, circle, parabola, etc.) and ﬁnd the functional form of y and z for the trajectory versus X (e.g. 2(13) 2 %x + 3 ). ...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern