Question

Shown in the figure is a very long semicylindrical conducting shell of radius R and carrying a current i. An infinitely long straight current carrying conductor is lying along the axis of the semicylinder. If the current flowing through the straight wire be i_o, then the force on the semicylinder is:

• A.
• B.
• C.
• D. None

Answer 1

Answer: (B)

Answer 2

The net magnetic force on the conducting wire

$= \mathrm { F } = \int 2 \mathrm { dF } \cos \theta$

_.Hence (2) is correct.