A Small Object Carries a Charge of 10

question 19

Multiple Choice

A small object carries a charge of 10.0 μC.If the object is so small that it can be regarded as a point charge,what is the energy density at a distance of 2.0 m from the charge? (The value of k is 9.0  10⁹ N·m²/C². )

• A)2.2 mJ/m³
• B)4.5 mJ/m³
• C)9.0 mJ/m³
• D)18 mJ/m³

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