Quiz05_solution

# Quiz05_solution - Name: Section: QUIZ #5 Physics 222, Fall...

This preview shows pages 1–3. Sign up to view the full content.

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.

Unformatted text preview: Name: Section: QUIZ #5 Physics 222, Fall 2011 Sep. 27, 2011 Version A Two parallel long wires are 10.0 cm apart and carry currents I and 3 I , respectively, flowing at the same direction. At what distance from each of the two wires the total magnetic field is zero? Solution d x 3 I B 2 I B 1 We need a point where both fields are equal in magnitude and opposite in directions. In all points to the left of the I-wire, both fields are pointing upward. Both will point downward to the right of the 3 I-wire. So, it is only possible to have zero field in between the two wires. Let’s denote the distance between the zero-field point and the I-wire as x and the distance between the two wires as d . So: B 1 = B 2 μ I 2 πx = μ (3 I ) 2 π ( d- x ) ⇒ 1 x = 3 d- x Solving for x x = d 4 = 2.5 cm So the field is zero between the two wires, 2.5 cm from the I-wire and 7.5 cm from the 3 I-wire. Name: Section: QUIZ #5 Physics 222, Fall 2011 Sep. 27, 2011 Version B Two parallel long wires are 6.0 cm apart and carry currents I and 3 I , respectively, flowing at opposite directions. At what distance from each of the two wires the total magnetic field is zero?directions....
View Full Document

## This note was uploaded on 11/14/2011 for the course PHYS 5863005 taught by Professor Meyer during the Fall '09 term at Iowa State.

### Page1 / 4

Quiz05_solution - Name: Section: QUIZ #5 Physics 222, Fall...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online