{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

# samp07 - counterclockwise the same direction as the emf of...

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

SAMPLE PROBLEM (Class 7) ANS. a) The induced emf must be calculated and added to the emf of the battery. The induced emf is given by dt d B i Φ - = E , so first, Φ B must be calculated. Since only half the area of the loop is in the field, Φ B = ½ L ² B , where L is the length of one side of the square loop. Then, dt dB L dt B L d dt d B i 2 ) ( 2 2 2 1 - = - = Φ - = E . B = 0.0420 – 0.870 t , so T/s 870 . 0 - = dt dB . B is decreasing . ) T/s 870 . 0 ( 2 ) m 00 . 2 ( 2 2 2 - - = - = dt dB L i E = 1.74 V Since B points out of the page, and it is decreasing, the induced emf is
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: counterclockwise, the same direction as the emf of the battery. Therefore, they add. E net = E i + E bat = 1.74 V + 20 V E net = 21.7 V, counterclockwise b) The current is in the direction of the net emf, counterclockwise. The current goes through the battery from negative terminal to positive terminal....
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