If a cube of side 5 cm has a change of 6 microculombs, then the surface charge density is

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4×102μC/m2

4×102C/m2

4×103 μC/m2

4×103 C/m2

answer is A.

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Detailed Solution

Here, q=6 μC, L=5cm=120m. Area of 6 facesof the cube =6 L2Surface charge density =q6 L2=66(1/20)2 =4×102μC/m2

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