1.10 Electric Flux

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1.10 Electric Flux

Conceptual Quiz

1. In the given figure, Electric flux through the surface is to be calculated *

1 point

There is no way to tell electric flux as value of E and A is not given

Even without knowing value of E and A, Electric flux can be calculated in terms of number of lines

2. If E and A are given, then electric flux in figure below is *

1 point

EA cos(theta)

EA Sin(theta)

can't be determined

3. Choose the correct option(s) *

1 point

Electric flux can be understood as number of field lines

Electric flux can be stated as product of E and A

Electric flux is equal to the scalar product of E and A

Electric flux is equal to (1/epsilon o) times charge enclosed by the Gaussian surface

Required

4. A sphere of radius R encloses a charge Q. If the radius of sphere is doubled *

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Flux through the sphere also doubles

Flux through the sphere becomes half

Flux through the sphere remains same

5. A square of side 'a' has a charge 'Q' kept at a height of 'a/2' from its centre. The flux through the square *

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cannot be calculated

is Q/(2 epsilon o)

is Q/(6 epsilon o)

is Q/(epsilon o)

6. A hemisphere is kept in a uniform electric field E such that E is perpendicular to its circular part. *

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If the hemisphere is closed the net flux through the hemisphere is zero

If the hemisphere is closed the net flux through the hemisphere is EA

If the hemisphere is opened the net flux through the hemisphere is EA

If the hemisphere is opened the net flux through the hemisphere is 2EA

Required

7. A cylindrical shell is open at one end. A charge Q is placed at the open face of the cylinder. The flux through the cylinder is *

1 point

Can't be determined

Q/(2 epsilon o)

Q/(epsilon o)

zero

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