A straight horizontal wire of mass 10 mg and length 1 m carries a current of 2 ampere…
Physics · JEE Main · NTA Exams — Magnetic Effects of Current and Magnetism
A straight horizontal wire of mass 10 mg and length 1 m carries a current of 2 ampere .What minimum magnetic field B should be applied in the region so that the magnetic force on the wire may balance its weight.
- 2.45 × 10-4 T
- 4.9 × 10-4 T
- 4.9 × 10-5 T
- 9.8 × 10-4 T
Answer
(C) 4.9 × 10 -5 T
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