{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# img043 - PHY2054 Spring 2008 15 The potential difference...

This preview shows page 1. Sign up to view the full content.

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

Unformatted text preview: PHY2054 Spring 2008 15. The potential difference between a pair of oppositely charged parallel plates is 450V when the plate separation is 1 pm. If the spacing between the plates is tripled without altering the charge on the plates, what is the new potential difference (in volts) between the plates? @ 1350 ( 150 (3) so (4) 450 (S) 4050 Since the charge is unchanged, the E ﬁeld is unchanged. Using V = Ed, the voltage is tripled to I 35 0 V. 16. Refer to the previous problem. If the plate separation is doubled to 2 pm while the potential difference between the plates is kept constant, what is the ratio of the ﬁnal charge on one of the pgtes to the original charge? @1/2 1/4 (3)2 (4)4 (5) 3 If the plate separation is doubled, the capacitance is halved. Thus if the voltage is unchanged, then by Q = CV the charge on the plates is halved. 17. Refer to the previous problem with the capacitor having its original plate separation otlﬂn. After being charged to a potential 0&0], the capacitor is disgopngcted from the circuit and has a slabof dielectric (x = 2.7) carefully inserted between the plates without touching them. The new pom @None of these (2) 320 (3) 120 (4)0 (5) 60 The charge is unchanged. Placing a dielectric inside has the eﬂect of reducing the voltage by K‘. Thus the new voltage is 120 /2. 7 = 44.4 V. l.‘ ...
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