A point charge q 1 = 3.75nC is located on the x -axis at x = 2.10m , and a secon

Question

A point charge q1 = 3.75nC is located on the x-axis at x = 2.10m , and a second point charge q2= -6.80nC is on the y-axis at y = 1.25m .

Part A

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r1 = 0.515m ?

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Part B

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r2 = 1.65m ?

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Part C

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r3 = 2.50m ?

A point charge q1 = 3.75nC is located on the x-axis at x = 2.10m , and a second point charge q2= -6.80nC is on the y-axis at y = 1.25m .

Part A

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r1 = 0.515m ?

? =   N?m2/C  

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Part B

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r2 = 1.65m ?

? =   N?m2/C  

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Part C

What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r3 = 2.50m ?

? =   N?m2/C  

Explanation / Answer

a) qenc = 0

so net flux = 0

b) now qenc = -6.8E-9 C

net flux = qenc/e0 = -6.8E-9/8.85E-12= -768

c) now qenc = -6.8E-9 + 3.75e-9

so net flux = (-6.8E-9 + 3.75e-9)/8.85E-12=-344.6

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