83 - Electricity Questions Answers
A GENERAL MESSAGE
Dear students
We request you to submit questions of any topic under the same category by selecting topic from the drop down list. Some students are asking question of one topic under the name of another topic. This creates inconvenience.
thanks
iitbrain
a small ball of mass m=1 kg and charge 2/3*10^-6 is placed at the center of a uniformly charged sphere of radius 1 m and charge 1/3 mC. a narrow smooth horizontal groove is made in the sphere from the center to the surface as ahown, the sphere is made to rotate about it vertical diameter at a constant rate of 1/(2 pie) revolutions per second. find the speed with respect to ground with which the ball slides out from the groove .
two charged particles of mass m and 2m have charges +2q and +q respectively. they are kept in a uniform electric field far away from each other and then allowed to move for some time t . find the ratio of their kinetic energy
a small ball of mass 1kg and a charge 2/3 uC is placed at the center of a uniformly charged sphere of radius 1m and charge 1/3 mC. a narrow smooth horizontal groove is made in the sphere from centre to surface as shown in figure. the sphere is made to rotate about its vertical diameter at a constant rate of 1/2pi revolutions per second. find the spedd w.r.t ground with which the ball slide out from the groove. neglect any magnetic force acting on ball?
What is the main priniciple strore energy in a capacitor ?
WHAT IS CHARGE ACTUALLY? IS IT ELECTRON, PROTON OR SOMETHING ELSE?
A house is served by 220V supply line.In a circuit protected by a fuse marked " 9 ampere" the maximum no. of (60 W,220W) bulbs that can safely connected in parallel is ?????