A Wire of Radius 0

question 74

Multiple Choice

A wire of radius 0.6 cm carries a current of 10 A that is uniformly distributed over its cross section.Calculate the magnetic field strength at r = 0.2 cm divided by that at r = 0.4 cm.

• A)1.0
• B)0.75
• C)0.50
• D)2.0
• E)3.0