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In the diagram shown below, the block has charge  Q and is attached at one end of the light spring. The surface is smooth and horizontal and spring is in its natural length. If the electric field E is switched on, the maximum elongation in the spring will be

 

Option 1 -

Q E k

Option 2 -

2 Q E k

Option 3 -

Q E 2 k

Option 4 -

3 Q E 2 k

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

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    2 weeks ago
    Correct Option - 2


    Detailed Solution:

    From work energy theorem

    W s p + W E = ? K

    - 1 2 k x 0 2 + Q E . x 0 = 0

    ? x 0 = 2 Q E k

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