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Question

# A circular plane sheet of radius 10cm is placed in a uniform electric field of 5×105NC−1, making an angle of 60o with field. The electric flux through the sheet is

A
1.36×102Nm2C1
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B
1.36×104Nm2C1
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C
0.515×102Nm2C1
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D
0.515×104Nm2C1
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Solution

## The correct option is A 1.36×104Nm2C−1Here, r=10cm=0.1m,E=5×105NC−1AS the angle between the pane sheet and the electric field is 60o, angle made by the normal to the plane sheet and the electric field is θ=90o−60o=30oϕE=EScosθ=E×πr2cosθ=5×105×3.14×(0.1)2cos30o=1.36×104Nm2C−1

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