Question

A wire along x-axis carries a current 3.5 A. Find the force on a 1 cm section of the wire exerted by:

B = 0.74 T – 0.3 T

• A. (2.59 + 1.26) × 10^–2
• B. (1.26 – 2.59) × 10^–2
• C. ( – 2.59 – 1.26) × 10^–2
• D. ( – 1.26 + 2.59) × 10^–2

Answer 1

Answer: (A)

(2.59 + 1.26) × 10^–2

Answer 2

F = I($\vec { l }$×) = 3.5[10^–2× (.74 – 0.36)]

= (2.59 + 1.26) × 10^–2