# 89 - Electricity Questions Answers

A small ball of mass 1kg and charge 2 C 3 is placed at the centre of a uniformly charged sphere of radius 1m and charge 1mC 3 . A narrow smooth 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 2 revolutions per second. Find the speed w.r.t. ground with which the ball slides out from the groove. Neglect any magnetic force acting on ball

Please explain krotov questions 3.26 of electricity

A uniform electric field is established by connecting the plates of a parallel plate capacitor to a 12v battery. A charge particle of +6.24x10 to the power -6c moves from rest from the positive plate to the negative plate. when the charge reaches the negative plate,it acquires a speed of 3.4m/s.what is{a} the mass of the charge particle and{b} its final kinectic energy?

An electric dipole moment p=(i-3j+2k)10^-29 Cm is at origin (0,0,0).The electric field due to this dipole at r=i+3j+5k (note p.r≠0) is parallel to ?

E= 2x/(x²+y2 ) i + 2y/(x²+y²) j

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