Recent content by khamaar

  1. K

    Relativistic problem ?

    Here is the complication. How do u tell that it was "A" who moved with the speed i mentioned. What if "A" claims that it was the surrounding (containing the "B" and "C") that moved. Doesn't "A" have the right to say that? Isnt Motion relative?....If "A" does have the right to say that, then he...
  2. K

    Relativistic problem ?

    I was thinking, Suppose there are three boys in one room. A B C. They time there watches perfectly with each other. In each of their watches the time is 6:00. Boy A starts flying around with velocity {[3^(1/2)]/2}.c.........he flies and boys B sees that the time on A's watch is ticking...
  3. K

    A simple question.

    A 12 volt battery is short circuited. what would be the potential difference between its terminals?
  4. K

    HELP! Light bulbs and circuits!

    May i ask why " P= V^2/R " was used to calculate the Resistance of the individual light bulbs? In doing so, the voltage in each case was taken constant. (120 V in second reply) How is this possible?. The voltage across the bulbs in series is not constant!!! If " P= (I^2)R " is used to calculate...
  5. K

    Which of the following particles would have the shortest wavelength?

    Thank you very much. I am infact startled at the fact that right after posting this question, i got back to my table and tried to re-calculate it...and it was the alpha particle...Strange isnt it?
  6. K

    Which of the following particles would have the shortest wavelength?

    which of the following particles would have shortest wavelength provided that all move with the same kinetic energy? electron, proton, neutron, alpha paricle? My professor said in class that it was alpha particle, but i think its electron... which one is right? and why?
  7. K

    Whats the Concept behind change of electric/magnetic flux ?

    so does this mean that if a a body moves thru a uniform magnetic field, there would be no change of flux through it?...if there is no change of flux, then where does that instantaneous emf come from which i explained in my first post?
  8. K

    Whats the Concept behind change of electric/magnetic flux ?

    i asked for the explanation of the "concept" of change in electric flux?... does it mean increase or decrease in number of lines intersecting a body?
  9. K

    Whats the Concept behind change of electric/magnetic flux ?

    Whats the Concept behind "change of electric/magnetic flux"? What i mean to say is that, i understand the concept of "change of distance", "change of time" and other changes and other time rates.... but the "time rate of change of electric flux" really confuses me. Does change of flux mean...
  10. K

    Is Postive Electric Field at high potential or Negative electric field?

    so an electron moves up the potential gradient in an electric field?
  11. K

    Is Postive Electric Field at high potential or Negative electric field?

    ohhhhh...thanks, i understand..but now there is one other problem. An electron is left in a positive electric field. Does it go Up the potential gradient? or down the potential gradient?.. thnx in advance... (PS. this is a question, which i read in some book today)
  12. K

    Work done by an Electric Field Clarification

    i think that, for W=-q (delta V) holds for, charge moved from higher potential to lower, or from lower to higher, CONSIDERING THAT THE FIELD IS DOING THE WORK. If the Field does work in moving the charge away. (to a lower potential) then its clear that the work is positive , since the...
  13. K

    Is Postive Electric Field at high potential or Negative electric field?

    What i mean to say is, for example we have two plates, one positive the other negative... By convention the positive is said to be at a higher potential than the negative one.. But what if i put an electron between these two plates. The electron would obviously go towards the positive...
  14. K

    When an Electric field does work on a charge, which equation should i use?

    Consider an positive electric field and a positive charge, q inside this field. Suppose the FIELD does work on this charge and takes it from point A to B. Now i am trying to figure out what sign i have to put with this work.. which equation should i use here? W= - (delta V) x (q)...
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