12. Why is the electric field lines perpendicular at a point on an equipotential surface of a conductor? 13. Using Gauss's law, derive an expression for the electric field intensity due to an infinitely long, straight wire of linear charge density 2 C/m. 14. Draw equipotential surfaces for (1) a point charge (i) a dipole, OR Sketch the electric field lines, when a positive charge is kept in the vicinity of an uncharged conducting plate, 15. Derive an expression for energy stored in a charged capacitor, Section-D All questions are compulsory. In case of internal choice attempt any one, 16. An electric dipole with dipole moment 4 x 104 Cmis aligned at 30' with the direction of a uniform electric held of magnitude 5% 10^NC. Calculate the magnitude of the torque acting on the dipole, 17. The given graph shows that variation of charge q versus potential difference V for two capacitors and C. The two capacitors have same plate separation but the plate area of C, is double than that of C. Which of the lines in the graph correspond to and C and why?
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12.In physics, a scalar or scalar quantity is a quantity that can be described by a single element of a number field, such as a real number, often accompanied by units of measurement, as in "10 cm".
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The Gauss law states that electric flux passing through any closed surface is equal to the charge enclosed by that surface divided by permittivity of vacuum.
- The Gauss law states that electric flux passing through any closed surface is equal to the charge enclosed by that surface divided by permittivity of vacuum.
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