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40 votes
40 votes
An electrostatic paint sprayer has a 0.17 m-diameter metal sphere at a potential of 25.0 kV that repels charged paint droplets onto the object to be painted, which is grounded (electric potential of 0).

User Jparanich
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1 Answer

7 votes
7 votes

Answer:


q=0.236uC

Step-by-step explanation:

From the question we are told that:

Diameter
d=0.17m

Radius
r=0.17/2=>0.085

Potential
E=25.0kV

Generally the equation for Potential on spere is mathematically given by


E=(1)/(4 \pi e_0)*(q)/(r)

Therefore


q=(25*10^3*0.085)/((1)/(4 \pi e_0))

Where


(1)/(4 \pi e_0)=9*10^9

Therefore


q=(25*10^3*0.085)/((9*10^9)}


q=0.236uC

User Michael Gecht
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2.9k points