PHY2044 - PHYSICS FOR ENGINEERS II
PRACTICE TEST FOR CHAPTER 22

Below you will find a set of 5 conceptual and numerical revision questions selected randomly from lots of questions I have put together covering the material in Chapter 22, "The Electric Field II: Continuous Charge Distributions". This includes questions on the electric field from Coulomb's Law and Gauss' Law, charges and fields at surfaces. When you have finished the quiz, click on the "Submit Quiz" button at the bottom and within seconds it will be automatically graded and the results returned to you!

To select a new set of questions click on the "Reload" or "Refresh" button on your browser. You may find some of the questions duplicated but that's the nature of a random selection. Try it a few times ... it's not fattening and you may learn something!

Many thanks to Mark Wood for producing the quiz-maker code.


Q1: An infinitely long cylinder of radius 4.0 cm carries a uniform volume charge density of 200 nC/m3. What is the electric field at r = 2.0 cm?

zero
1.1 × 102 N/C
57 N/C
4.4 × 102 N/C
2.3 × 102 N/C

Q2: An infinitely long cylindrical shell of radius 6.0 cm carries a uniform surface charge density of 12 nC/m2. The electric field at r = 5.9 cm is approximately

1.2 × 104 N/C
5.6 × 102 N/C
1.3 × 103 N/C
8.1 × 102 N/C
zero

Q3: An infinitely long cylindrical shell of radius 6.0 cm carries a uniform surface charge density of 12 nC/m2. The electric field at r = 10 cm is approximately

1.2 × 104 N/C
5.6 × 102 N/C
1.3 × 103 N/C
8.1 × 102 N/C
zero

Q4: A large, flat conducting plate has a surface charge density of 8.0 × 10-9 C/m2 on one of its surfaces. What is the magnitude of the electric field 1.0 × 10-5m from this plate?

72 N/C
2.3 × 102 N/C
9.0 × 102 N/C
9.0 × 103 N/C
1.3 × 103 N/C

Q5: What is the electric flux passing through a Gaussian surface that surrounds a +0.075 C point charge?

8.5 × 109 N.m2/C
6.8 × 108 N.m2/C
1.3 × 107 N.m2/C
4.9 × 106 N.m2/C
7.2 × 105 N.m2/C

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