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| 1. |
Explain electric field and also electric field is point charge. |
| Answer» <html><body><p></p>Solution :Suppose, charge Q is placed at origin .O. in free <a href="https://interviewquestions.tuteehub.com/tag/space-649515" style="font-weight:bold;" target="_blank" title="Click to know more about SPACE">SPACE</a>. If another charge q is placed distance r at point P (OP =r), then Coulomb force acts on q. <br/> `vecF = 1/(pi epsilon_(0)).(Qq)/r^(2)hatr` <br/> If Q = 1C, then force acting on unit charge is called electric field E. <br/> `therefore vecF/q = 1/(<a href="https://interviewquestions.tuteehub.com/tag/4pi-1882352" style="font-weight:bold;" target="_blank" title="Click to know more about 4PI">4PI</a> epsilon_(0)).Q/r^(2) hatr` <br/> `therefore vecE = 1/(4pi epsilon_(0)).Q/r^(2)hatr` or `E = (kQ)/r^(2)` <br/> Definition of electric field : The region around the charge in which the effect of electric charge is <a href="https://interviewquestions.tuteehub.com/tag/prevailing-2950879" style="font-weight:bold;" target="_blank" title="Click to know more about PREVAILING">PREVAILING</a> is called the electric field of the charge. <br/> Electric field `vecE` is also called electric fielt intensity. Force acting on charge q of position vector `vecr` is `vecF(vecr) =qvecE(vecr)` <br/> Electric field `vecE` is also called electric field intensity. <br/> Definition of Electric field : .The force acting on a unit positive charge at a given point in an electric field of a point charge of the system at charge is called the electric field or intensity of electric field `vecE`at that point.<br/> SI unit of electric field intensity is `NC^(-1)` or `<a href="https://interviewquestions.tuteehub.com/tag/vm-728443" style="font-weight:bold;" target="_blank" title="Click to know more about VM">VM</a>^(-1)`and <a href="https://interviewquestions.tuteehub.com/tag/dimensional-2582799" style="font-weight:bold;" target="_blank" title="Click to know more about DIMENSIONAL">DIMENSIONAL</a> formula is `[M^(1)L^(1) T^(-3) A^(-1)]`</body></html> | |