Question

An electrostatic paint sprayer has a 0.216-m-diameter metal sphere at a potential of 24.0 kV that repels paint droplets onto a grounded object. What charge is on the sphere? 2.8810470 Enviar Respuesta Ya has introducido esa respuesta antes Incorrecto. Tries 2/3 Intentos Anteriores What charge must a 0.104-mg drop of paint have to arrive at the object with a speed of 8.00 m/s? Enviar Respuesta Tries 0/3

Answer 1

For the first part ,use the formula of potential at a given point to find the value of charge .

For the second part ,use the kinetic energy theorem to find the charge of droplet .

Diameter 0.216 m) Radius= 0.216 o. 108 m { Potential 24 ky As V ko R 9x10' x a 24x10 6.108 As the sphere is positively charged because it is reepelled by rounded earth. } the { K = 1 to Litto 4RX 8.87810 aux 10 x 0.108* 9x10° 23.3 2 x lol 2. 33 x 1012 C 9 k=9x10 AMYC² So work suppose initial velocity of drop is on According to q AV skinetic energy net work done quals change in kinetic 3 Energy Theorem 2 x 24x10 muz q = 0.5X o.104 x 10 x (8² = 0.13 8x10c Energy 3 24x10