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A sphere of radius with a uniform charge density ρv C/m3 shall have electric flux density at radius “r = a” equal to
Options:
A .   ρv/3 C/m2.
B .   aρv/3 C/m2.
C .   aρv/4 C/m2.
D .   aρv C/m2.
Answer: Option B
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