Please explain for each thanks. 1) A positive point charge is enclosed in a holl
ID: 1302862 • Letter: P
Question
Please explain for each thanks.
1) A positive point charge is enclosed in a hollow metallic sphere that is grounded. As compared to the case without the hollow sphere, the electric field at a point directly above the hollow sphere has
a) diminished to zero
b) diminished somewhat
c) increased somewhat
d) not changed
2) If a solid metal sphere and a hollow metal sphere of equal diameters are each given the same charge, the electric field (E) midway between the center and the surface is
a) greater for the solid sphere than for the hollow sphere
b) greater for the hollow sphere than for the solid sphere
c) zero for both
d) equal in magnitude for both, but ne is oppsite in direction from the other.
3) A cubic block of aluminum rests on a woden table in a region where a uniform electric field is directed straight upward. What can be said concerning the charge on the block's top surface?
a) The tp surface is charged positively
b)the top surface is charged negatively
c) The top surface is neutral
d)The top surface charge cannot be determined without further information
4) A solid block of metal in electrostatic equilibrium is placed in a uniform electric field. Give a statement concerning the electric field in the block's interior.
a) The interior field in a direction opposite to the exterior field.
b)The interior field points in a directin that is at right angles to the exterior field.
c)The interior points in a direction that is parallel to the exterior field
d)There is no electric field in the block's interior.
Explanation / Answer
1)d) not changed
reason: net charge eneclosed by gausian surface does not change
2)c) zero for both
reason: net charge eneclosed by gausian surface is zero. beacuse foe a
conductor charge always lies on surface
3)a) The top surface is charged positively
reason: electric force on positive charge will be upward
4)d)There is no electric field in the block's interior.
due to charge separation there will be electric field in side which is opposite to the exteriae electric field.
so, the net electric field inside is zero.