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A light beam is described by E = 800 sin ω ( t − x c ) .  An electron is allowed to move normal to the propagation of light beam with a speed of 3 × 107 ms-1. What is the maximum magnetic force exerted on the electron?

Option 1 -

1.28 * 10-21 N

Option 2 -

1.28 * 10-18 N

Option 3 -

 12.8 * 10-17 N

Option 4 -

12.8 * 10-18 N

0 2 Views | Posted 2 months ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    2 months ago
    Correct Option - 4


    Detailed Solution:

    B 0 = E 0 c = 8 0 0 3 × 1 0 8 T              

    F m a x = e v B 0 = 1 . 6 × 1 0 − 1 9 × 3 × 1 0 7 × 8 0 0 3 × 1 0 8 = 1 2 . 8 × 1 0 − 1 8 N

      

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