{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

s05_concept

# s05_concept - Light Bulb II Concept Test A 24 V B S 12 V C...

This preview shows pages 1–4. Sign up to view the full content.

Light Bulb II Concept Test S C A B 24 V 12 V The light bulbs in the circuit are identical. When the switch is closed, 1. The intensities of light bulbs B and C increase. 2. The intensities of light bulbs B and C decrease. 3. The intensity of light bulb A increases. 4. The intensity of light bulb A decreases. 5. A combination of 1 and 4 6. A combination of 2 and 3 7. Nothing happens 8. None of the above

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

View Full Document
Light Bulb II Solution 0 5 10 15 20 25 30 35 40 1 2 3 4 5 6 7 8 Number of Students Answer Lecture S5: Light Bulb II 0 10 20 30 40 50 1 2 3 4 5 6 7 8 Number of Students Answer Lecture S5: Light Bulb II Before the switch is closed, the current through the three bulbs must be the same. Thus, the voltage drop across each bulb is the same. Because the total voltage drop across the three bulbs is 24 V, the drop across each bulb must be 8 V. Therefore, if we designate the lower node as ground, the
potential of the node to the left of the switch is 16 V. After the switch is closed, the potential of the node to the left of the switch must be 12 V, since the upper terminal of the battery is 12 V above ground potential.

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.

{[ 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