13.) An electrostatic paint sprayer has a 0.6 m diameter metal sphere at a poten

Question

13.) An electrostatic paint sprayer has a 0.6 m diameter metal sphere at a potential of 12 kV that repels paint droplets onto a grounded object. What charge is on the sphere? Give answer in terms of 10-7 C.

14.) An electrostatic paint sprayer has a 0.6 m diameter metal sphere at a potential of 12 kV that repels paint droplets onto a grounded object. What charge is on the sphere? Give answer in terms of 10-7 C.

15.) What charge is stored in a 163 F capacitor when 102 V is applied to it? Give answer in terms of mC.

Explanation / Answer

13 ans

Given that

electric potential V=12*10^3 v

diameter D=0.6 m

radius r=0.3 m

basing on the concept of electric potential

now we find the charge on the sphere

V=kQ/r

12*10^3=9*10^9*Q/0.3

charge Q=4*10^-7 C

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(14) ans

Given that

electric potential V=12*10^3 v

diameter D=0.6 m

radius r=0.3 m

basing on the concept of electric potential

now we find the charge on the sphere

V=kQ/r

12*10^3=9*10^9*Q/0.3

charge Q=4*10^-7 C

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(15) ans

Given that

electric potential V=102 v

capacitor C=163*10^-6 F

now we find the charge

charge Q=CV=163*10^-6*102=16.63 mC

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