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JEE Main 2012 Physics question

PhysicsElectric Charges and FieldsJEE Main 2012

The electric potential V(x) in a region around the origin is given by volts. The electric charge enclosed in a cube of 1 m side with its centre at the origin is (in coulomb)

Answer: (4)

Solution

. At the face x = +0.5 m, (inward), flux ; at x = −0.5 m, (also inward), flux = −4. Total flux = −8 V m, so $q = ε_0Φ =

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Question ID VK-103371