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BITSAT2020PhysicsMagnetic Effects of CurrentActual

An electron moves in a circular arc of radius 10 m at a contant speed of 2 10⁷ ~ms ⁻¹ with its plane of motion normal to magnetic flux density of 10⁻⁵ ~T . What will be the value of specific charge of the electron?

Options

  1. A2 10⁴ Ckg ⁻¹
  2. B2 10⁵ Ckg ⁻¹
  3. C5 10⁶ Ckg ⁻¹
  4. D2 10¹¹ Ckg ⁻¹

Correct answer

D. 2 10¹¹ Ckg ⁻¹

Step-by-step solution

Bqv = mv ² / r or q / m = v / rB .

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