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  1. L

    Physics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Physics%20(9702)/9702_w11_qp_22.pdf Hello, can someone explain the answer to 5b and why it results into a current. Thanks, i get the other parts to the question :D
  2. L

    Physics: Post your doubts here!

    thank you : D. for the formation of stationary waves, do the waves need some kind of phase difference to form, like if it is formed from reflection, what would you call the phase thhat they meet at if this makes sense
  3. L

    Physics: Post your doubts here!

    Hello, and thanks in advance : D I am taking AS physics and have some questions. 1. What are the conditions for a formation of a stationary wave: e.g same speed and frequency but what else? 2. What is the difference between a potential divider circuit and a potentiometer? iiwhat is the...
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