Classes
Class 9Class 10First YearSecond Year  $13.19. What are hazards of staticelectricity?$  $The electric flux through the surface of a sphere having a point charge at its centre depends upon:A) Surface area of sphereB) Radius of sphereC) Quantity of charge inside the sphereD) None of these$  $An electric field is most directly related to:A) The momentum of a test chargeB) The kinetic energy of a test chargeC) The potential energy of a test chargeD) The force acting on a test charge$  $13.4. What is gold leaf electroscope? Discuss its working principle with a labelled diagram.$  $Three capacitors of capacitance 2 \mu \mathrm{F} each are connected in parallel. Their equivalent capacitance will be:A) 0.66 \mu \mathrm{F} B) 4 \mu \mathrm{F} C) 6 \mu \mathrm{F} D) 1.5 \mu \mathrm{F}$  $The force experience by a charge 10 \mu \mathrm{C} when placed at a point is 10^{-5} \mathrm{~N} . the electric field intensity at the point is:A) 0.1 \mathrm{NC}^{-1} B) 1 \mathrm{NC} C) 10 \mathrm{NC}^{-1} D) 1 \mathrm{NC}^{-1}$  