Exam #1 June 15.docx - Physics 222. Exam #1 Chapters 15 ...

Physics 222. Exam #1 (Chapters 15, 21-24) on June 15. 6:20 to 9:00 pm. 75 points +
7 extra credit. 56 Multiple Choice Points & 19 Short Answer Points.
NAME ____________________________________________
Open Book. You can use any legitimately obtained resources except help from a real-time,
live person. Upload your answers to Canvas before 9 pm! The instructor is available on
Zoom until 9:15 pm if you have any problems or need a question interpreted.
Multiple Choice & True/False Questions – No need to show your work or reasoning
1. True or False? If Sonya makes a parallel-plate capacitor where one of the plates has
twice the area of the other, the two plates will hold equal but opposite charges.
(a) True
(b) False
2. True or False? Both the voltage and the E-field are zero at the midpoint between two
oppositely charged point charges of the same magnitude.
3. What is the potential at point P? 4. If I want to increase the capacitance provided by a given air-filled parallel plate capacitor,
which of these things will help? Choose ALL that apply.
1

5. A particular ultrasonic speaker (“transducer”) used for sonar generates sound waves
with a wavelength of 1.2 feet in seawater. If the velocity of sound in seawater is about 5000.
feet/second, what is the frequency of the sonar sound wave?
(a) 1300 Hz
(b) 4200 Hz
(c) 5000 Hz
(d) 6200 Hz
(e) 14 kHz