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WorksheetsGauss' Law
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
The electric flux Φ through a surface
a)
is the amount of electric field piercing the surface
b)
is the electric field multiplied by the area.
c)
does not depend on the area involved
d)
is the line integral of the electric field around the edge of the surface
2.
Charge Q is distributed uniformly throughout a spherical insulating shell. The net electric flux through the inner surface of the shell is:
a)
0
b)
Q/e0
c)
2Q/e0
d)
Q/4*Pi*e0
3.
The area vector for a flat surface
a)
is parallel to the surface and has a magnitude equal to the length of a side of the surface.
b)
is perpendicular to the surface and has a magnitude equal to the length of a side of the surface.
c)
is parallel to the surface and has a magnitude equal to the area of the surface.
d)
is perpendicular to the surface and has a magnitude equal to the area of the surface.
4.
When a piece of paper is held with one face perpendicular to a uniform electric field the flux through it is 25 N×m2/C. When the paper is turned 25° with respect to the field the flux through it is:
a)
0 N×m2/C
b)
11 N×m2/C
c)
12 N×m2/C
d)
23 N×m2/C
5.
The flux of the electric field (24 N/C) + (30 N/C) + (16 N/C) through a 2.0 m2 portion of the yz plane is:
a)
32 N × m2/C
b)
34 N × m2/C
c)
42 N × m2/C
d)
48 N × m2/C
6.
A cylindrical wastepaper basket with a 0.15-m radius opening is in a uniform electric field of 300 N/C, perpendicular to the opening. The total flux through the sides and bottom is:
a)
0 N×m2/C
b)
4.2 N×m2/C
c)
21 N×m2/C
d)
280 N×m2/C
7.
A closed cylinder with a 0.15-m radius ends is in a uniform electric field of 300 N/C, perpendicular to the ends. The total flux through the cylinder is:
a)
0 N×m2/C
b)
4.2 N×m2/C
c)
21 N×m2/C
d)
280 N×m2/C
8.
A physics instructor in an anteroom charges an electrostatic generator to 25 mC, then carries it into the lecture hall. The net electric flux through the lecture hall walls is:
a)
0 N×m2/C
b)
25 ´ 10–6 N×m2/C
c)
2.2 ´ 105 N×m2/C
d)
2.8 ´ 106 N×m2/C
9.
A point particle with charge q is placed inside a cube but not at its center. The electric flux through any one side of the cube:
a)
is zero
b)
is q/e0
c)
is q/4e0
d)
is q/6e0
10.
A 3.5-cm radius hemisphere contains a total charge of 6.6 ´ 10–7 C. The flux through the rounded portion of the surface is 9.8 ´ 104 N×m2/C. The flux through the flat base is:
a)
0 N×m2/C
b)
+2.3 ´ 104 N×m2/C
c)
–2.3 ´ 104 N×m2/C
d)
–9.8 ´ 104 N×m2/C
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