[{"id":227149,"question":"If the medium between the charges is not free space then electrostatic force will.be","choices":[{"text":"Increase","value":"A"},{"text":"Decrease","value":"B"},{"text":"Remain same","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177701,"question":"Two parrallel, metal plates are a distance 8.00 m apart. The electric field between the plates in uniform, Directed toward the right , and has a magnitude of 4.00 N/C. If an ion of charge +2e is released at rest at the left-hand plate. What is its kinetic energy when reaches the right-hand plate?","choices":[{"text":"4 eV","value":"A"},{"text":"64 eV","value":"B"},{"text":"32 eV","value":"C"},{"text":"16 eV","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177695,"question":"The electric field in some region of of space is uniform in magnitude and direction. Which one of the following five statements best desccribes the volume charge density (<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ</span>) , in this region of space?","choices":[{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ = 0</span>","value":"A"},{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ decreases linearly in the direction of the electric field</span>","value":"B"},{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ increases linearly in the direction of the electric field</span>","value":"C"},{"text":"<span style=\"color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 16px;\">ρ has a uniform value throughout the region</span>","value":"D"},{"text":"<br>","value":"E"}],"correctAnswer":1},{"id":177688,"question":"A one microfarad capacitor of a TV is subjected to 4000 V potencial difference.The energy stored in capacitor is:","choices":[{"text":"8 j","value":"A"},{"text":"16 j","value":"B"},{"text":"4 x 10<sup>-3</sup>j","value":"C"},{"text":"2 x 10<sup>-3</sup>j","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":177687,"question":"A capacitor is charged with a battery and then it is disconnected. A slab of dielectric is now inserted between the plates, Then","choices":[{"text":"The charge in the plates reduces and potencial difference increase","value":"A"},{"text":"Potencial difference between the plates increase, stored energy decreases and charge remains the same","value":"B"},{"text":"Potencial difference between the plates decreases, stored energy decreases and charge remains unchanged","value":"C"},{"text":"None of them","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":177686,"question":"A proton is about 1840 time than an electron. When it is accelerated by a potencial difference if 1 kV, its kinetic energy will be:","choices":[{"text":"1884 ke V","value":"A"},{"text":"1/1840 keV","value":"B"},{"text":"1 keV","value":"C"},{"text":"920 keV","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":177684,"question":"Electric potencial of earth is taken to be zero because the earth is good:","choices":[{"text":"Semiconductor","value":"A"},{"text":"Conductor","value":"B"},{"text":"Insulator","value":"C"},{"text":"Dielectric","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":177682,"question":"Some charge is being given to a conductor. Then its potencial","choices":[{"text":"Its maximum at surface","value":"A"},{"text":"Its maximum at Its maximum at center","value":"B"},{"text":"Is remain same throughout the conductor","value":"C"},{"text":"Is maximum somewhere between surface and centre","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":177678,"question":"A charge Q is divided into tweo parts q and Q-q and seperated by a distance R. The force of equilibrium between them will be maximum when:","choices":[{"text":"q=Q/4","value":"A"},{"text":"q=Q/2","value":"B"},{"text":"q=Q","value":"C"},{"text":"None of these","value":"D"},{"value":"E"}],"correctAnswer":2},{"id":60140,"question":"Coulomb's force is:","choices":[{"text":"Conservative force","value":"A"},{"text":"None conservative force","value":"B"},{"text":"Similar to frictional force","value":"C"},{"text":"None of the above","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60138,"question":"The leV =","choices":[{"text":"1.6x10-19C","value":"A"},{"text":"1.6x10-11J","value":"B"},{"text":"1.6x10-19J","value":"C"},{"text":"1.6x10-11C","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60137,"question":"Electric potential at a distance ''r'' from ''q'' is:","choices":[{"text":"V<sub>r</sub> = 1/54πε<sub>∘</sub>q/r<sub>2</sub>","value":"A"},{"text":"Vr=1/4πε<sub>∘</sub><sup>2</sup>q/r","value":"B"},{"text":"V<sub>r</sub>=1/4πε<sub>∘</sub>2q/r","value":"C"},{"text":"V<sub>r</sub>=1/4πε<sub>∘</sub>q<sup>2</sup>/r","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60133,"question":"The electrical intensity is equal to:","choices":[{"text":"-Δr/Δv","value":"A"},{"text":"Δv/Δr","value":"B"},{"text":"Δv/Δv","value":"C"},{"text":"-Δv/Δr","value":"D"},{"value":"E"}],"correctAnswer":4},{"id":60131,"question":"Electric intensity due to an infinite sheet of charge is:","choices":[{"text":"∂/2ε<sub>∘</sub>","value":"A"},{"text":"∂/rε<sub>∘</sub>","value":"B"},{"text":"∂/r2ε<sub>∘</sub>","value":"C"},{"text":"none of these","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60128,"question":"Net charge enclosed by Gaussian surface is:","choices":[{"text":"zero","value":"A"},{"text":"maximum","value":"B"},{"text":"depend on intensity","value":"C"},{"text":"none of all","value":"D"},{"value":"E"}],"correctAnswer":1},{"id":60127,"question":"Flux through any closed surface is:","choices":[{"text":"1/ε<sup>2</sup><sub>∘</sub> times the total charge enclosed in it","value":"A"},{"text":"ε<sup>2</sup><sub>∘</sub> time the total charge enclosed in it","value":"B"},{"text":"1/ε<sub>∘</sub> ties the total charge enclosed in ti","value":"C"},{"text":"ε<sub>∘</sub> time the total charge enclosed in it","value":"D"},{"value":"E"}],"correctAnswer":3},{"id":60125,"question":"The total flux through a closed surface.","choices":[{"text":"Directly proportional to shape and geometry","value":"A"},{"text":"Independent of medium","value":"B"},{"text":"Depend on shape and geometry","value":"C"},{"text":"Dependent on medium and the charge enclosed","value":"D"},{"value":"E"}],"correctAnswer":4}]