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NEET2023PhysicsMagnetic Effects of CurrentActual

A long straight wire of length 2 ~m and mass 250 ~g is suspended horizontally in a uniform horizontal magnetic field of 0.7 ~T . The amount of current flowing through the wire will be (g=9.8 ~ms ⁻² )

Options

  1. A2.75 ~A
  2. B1.75 ~A
  3. C2.45 ~A
  4. D2.25 ~A

Correct answer

B. 1.75 ~A

Step-by-step solution

we know aligned & F=m g & I B=m g aligned I= m g B = 250 10⁻³ 9.8 (2)(0.7) aligned & I=1750 10⁻³ ~A & I=1.75 ~A aligned

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