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NEET2014PhysicsMagnetic Properties of MatterActual

Magnetic field of the earth is H=0.3 ~g . A magnet is vibrating 5 oscillations per min then the dippreciation required in the magnetic field of the earth of increase time period upto 10 oscillations per minute is

Options

  1. A2.25 g
  2. B0.6 g
  3. C0.9 g
  4. D0.12 g

Correct answer

A. 2.25 g

Step-by-step solution

We know that T 1 H T₁ T₂ = H₂ H₁ , 5 10 = H₂ 3 1 2 = H₂ 3 aligned & & 1 4 & = H₂ 3 & & H₂ & =0.75 aligned Dippreciation in field =3-0.75=2.25

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