A metallic sphere has a charge of+5 nC. A negatively charged rod has a charge of
ID: 1416010 • Letter: A
Question
A metallic sphere has a charge of+5 nC. A negatively charged rod has a charge of-9nC. When the rod touches the sphere,5*1069 electrons arc transferred. What are the charges of the sphere and the rod now? It the electrical force of repulsion between two same amount of charges is 5 N. and they are 9*10000 m apart. What is the magnitude of each charge? Three charges A 5 mu C), B 9muC) and C5 mu C) are placed at the vertices of a right angle triangle ABC. AC 10 cm, BC=6 cm. Find net force on charge B due to C and A charges.Explanation / Answer
3) Since rod is negatively charged, and sphere positively charged, electrons will flow from rod to sphere
charges on sphere = 5nC + charge on one electron×number of electron transferred
= 5e-9 - 1.6e-19*5e10
= -3*10^-9 C
= -3nC
Charges on rod = charge on rod - charge transferred
= -9e-9 + 1.6e-19*5e10
= - 1 nC