P31_087 - i must increase by a factor of 2. Therefore, i...

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

View Full Document Right Arrow Icon
87. (a) We use U B = 1 2 Li 2 to solve for the self-inductance: L = 2 U B i 2 = 2(25 . 0 × 10 3 J) (60 . 0 × 10 3 A) 2 =13 . 9H . (b) Since U B i 2 ,for U B to increase by a factor of 4,
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: i must increase by a factor of 2. Therefore, i should be increased to 2(60 . 0 mA) = 120 mA....
View Full Document

Ask a homework question - tutors are online