Recent content by Rishav sapahi

  1. R

    How to Determine the Speed of Light Using Planck's Constant?

    No the known variables are only frequency , wavelength and Planck's constant and I have to find speed of light.
  2. R

    How to Determine the Speed of Light Using Planck's Constant?

    Homework Statement Find the speed of light using Planck's constant measuring apparatus Homework Equations E=h(frequency) E=(h*c)wavelength The Attempt at a Solution Can I substitute E=mc2 and use the mass of electron in the equation?
  3. R

    Any efficient method to find divisors of a number

    I am asking about the algorithm on which they works as I have come across an algorithm on fundamental theorem of arithmetic but it was not so much clear.
  4. R

    Any efficient method to find divisors of a number

    Like if number is too big then normal division is very much tedious task to do
  5. R

    Modulus & Division: Last Digit of Numbers Explained

    Yes , for me , its very much amusing .This thing is forcing me to study number theory .
  6. R

    Modulus & Division: Last Digit of Numbers Explained

    Isn't it amusing ?What could be the probable explanation for this?Also when operated by division operator gives the rest of the number as the quotient (Note only when the divisor is 10)
  7. R

    Why potential of n side is higher in unbiased p-n junction

    so Is high potential just means that given side is more positively charged than other
  8. R

    Why potential of n side is higher in unbiased p-n junction

    but in my book they are stating that n-side is at higher potential without any explanation
  9. R

    Earth magnetism and its application

    if magnetic field induce current then why satelites or spaceship doesn't gets electrified due to Earth magnetism
  10. R

    Why potential of n side is higher in unbiased p-n junction

    why the potential of n side is higher than that of the p side when no battery is connected to the p-n junction?
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    Why p type semiconductor is electrically neutral

    Thanks to all i got it now,its just that mere presence of an electron or a hole doesn't make it charged as in p type or in n type semiconductor ,electrons and protons are equal in number ,i was confused about the term impurity ,was not sure that they were atoms ...
  12. R

    Why p type semiconductor is electrically neutral

    But they have holes greater in number then electrons so it will not affect its neutrality and will make it positive in nature
  13. R

    Why p type semiconductor is electrically neutral

    why p type semiconductor is electrically neutral and what is the concept of drift current?
  14. R

    How to Integrate 1+tanx.tan(x+a)?

    i am not getting the answer ,the answer is cot a.log{sec(x+a)\secx}+c
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