A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air by a uniform horizontal magnetic field B. what is the magnitude of magnetic field??
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Explanation:
Mass of wire (m) = 200 grams or 0.2 kg
length (L) = 1.5 m
Current (I) = 2 A
Acceleration due to gravity (g) = 9.8 m/s^2
The weight of the wire will be balanced by the magnetic force acting in the opposite direction.
Let the magnetic field be B.
mg = ILB
B = 0.653 T
The value of uniform magnetic field is 0.653 T.
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