Question

1)

How do you determine the direction of the electric field from afield map?

a		The electric field is perpendicular to the field lines everywhere.
b		The field lines point in the direction of the electric field.
c		The field lines point in the opposite direction of the electric field.
d		You can not determine the direction of the electric field by the field map alone; the sign of the charge is needed

2)

An arbitrarily shaped uncharged conductor is added to a field map. Which field lines are affected by the addition of the conductor?

a		No field lines are affected
b		Only field lines that intersect the conductor are affected
c		Most field lines are somewhat affected

3)

For Gauss's law where is the Electric field evaluated?

a		All points in space
b		The center of the charge distribution
c		At an arbitrary point in space
d		On the Gaussian surface
e		It depends on the symmetry

4)

For what kind of charge distributions does Gauss's law hold?

a		Only highly symmetric charge distribution
b		Any symmetric charge distribution
c		Any charge distribution
d		Positive charge distribution
e		Negative Charge distribution

Answer 1

Ans . Electric field is given by drawing tangent at a point on the field lines . But the direction of field lines depends upon the sign of charge , so electric field depends upon the type of charge .

Option D is correct .

Ans2. When we place an uncharged conductor in an external field the field is affected near it . Field lines intersects a conductor perpendicularly .

So option B is correct.

Ans 3. For gauss law we need to evaluate net electric flux through the gaussian surface , for which electric field on the gaussian surface is evaluated.

Option D is correct.

Ans 4. Gauss law is true for any kind of charge distribution whether symmetric or not . It does not depend upon the shape of the distribution.

So option C is correct.