A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction being parallel to the axis along east to west. A current carrying wire in north-south direction passes through this region. The wire intersects the axis and experiences a force of 1.2 N downward. If the wire is turned from north south to northeast-southwest direction,then magnitude and direction of force is
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a
1.2.N, upward
b
1.22downward
c
1.2. N, downward
d
1.22 N downward
answer is C.
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Detailed Solution
Initially: 1.2N=1(l→×B→) downward In the given condition: F=IlsinθBsinθ=IIB=1.2 N downward
A uniform magnetic field of 1.5 T exists in a cylindrical region of radius 10.0 cm, its direction being parallel to the axis along east to west. A current carrying wire in north-south direction passes through this region. The wire intersects the axis and experiences a force of 1.2 N downward. If the wire is turned from north south to northeast-southwest direction,then magnitude and direction of force is