Question

Step 1

a) Given,

mass of sphere, m=7.20 mg

Converting mg in to kg, mass m= 7.20*10^{-6} kg

Sphere charge, q=-2.80nC = -2.8*10^{-9}C

Distance, d_{1}=1.64*10^{-6}m

Fixed charge, Q = 8.45*10^{-9}C

Kinetic energy and velocity to be measured at distance, d_{2}=0.50*10^{-6}m

Step 2

From the law of conservation of energy,

KE_{1}- Initial Kinetic Energy

PE_{1}- Initial Potential Energy

KE_{2}- Final Kinetic Energy

PE_{2}- Final Potential Energy

Step 3

As tiny sphere charge is initially at rest. ...

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