Skip to ContentGo to accessibility page
OpenStax Logo
Physics

Multiple Choice

PhysicsMultiple Choice

Multiple Choice

19.1 Ohm's law

30 .
What are the SI units for electric current?
  1. C/s
  2. e/s
  3. − e / s
  4. C/s 2
31 .
What quantity is used to describe the ability of a material to limit current flow?
  1. C/m
  2. C/s
  3. Ω
  4. V
32.

The equivalent unit for an ohm is a ________.

  1. V/A
  2. C/m
  3. A V A V
  4. V/s
33 .
You put 9.0 V DC across resistor R 1 and measure the current through it. With the same voltage across resistor R 2 , you measure twice the current. What is the ratio R 1 R 2 ?
  1. 1
  2. 1 2
  3. 4
  4. 2

19.2 Series Circuits

34.

What does the circuit element shown represent?

  1. a battery
  2. a capacitor
  3. the ground
  4. a switch
35.

How many 10-Ω resistors must be connected in series to make an equivalent resistance of 80 Ω?

  1. 80
  2. 8
  3. 20
  4. 40
36.

Which two circuit elements are represented in the circuit diagram?

  1. a battery connected in series with an inductor
  2. a capacitor connected in series with a resistor
  3. a resistor connected in series with a battery
  4. an inductor connected in series with a resistor
37.

How much current will flow through a 10-V battery with a 100-Ω resistor connected across its terminals?

  1. 0.1 A
  2. 1.0 A
  3. 0
  4. 1,000 A

19.3 Parallel Circuits

38.

A 10-Ω resistor is connected in parallel to another resistor R . The equivalent resistance of the pair is 8 Ω. What is the resistance R?

  1. 10 Ω
  2. 20 Ω
  3. 30 Ω
  4. 40 Ω
39.

Are the resistors shown connected in parallel or in series? Explain.

  1. The resistors are connected in parallel because the same current flows through all three resistors.
  2. The resistors are connected in parallel because different current flows through all three resistors.
  3. The resistors are connected in series because the same current flows through all three resistors.
  4. The resistors are connected in series because different current flows through all three resistors.

19.4 Electric Power

40 .
Which equation below for electric power is incorrect?
  1. P = I 2 R
  2. P = V R 2
  3. P = I V
  4. P = V 2 R
41 .
What power is dissipated in a circuit through which 0.12 A flows across a potential drop of 3.0 V ?
  1. 0.36 W
  2. 0.011 W
  3. Voltage drop across is 5 V .
  4. 2.5 W
42 .
How does a resistor dissipate power?
  1. A resistor dissipates power in the form of heat.
  2. A resistor dissipates power in the form of sound.
  3. A resistor dissipates power in the form of light.
  4. A resistor dissipates power in the form of charge.
43.

What power is dissipated in a circuit through which 0.12 A flows across a potential drop of 3.0 V?

  1. 0.36 W
  2. 0.011 W
  3. 5 V
  4. 2.5 W
PreviousNext
Order a print copy
Citation/Attribution
Reuse and redistribution of this content in digital or print format:
  • This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's prior written permission.
  • This book uses the Creative Commons Attribution License, which means that you can reuse and modify the material only for noncommercial purposes, must attribute Texas Education Agency (TEA), and must distribute any derivative works under the same license. The original material is available at: https://www.texasgateway.org/book/tea-physics . Changes were made to the original material, including updates to art, structure, and other content updates.
  • Any commercial printing of this textbook, including using a local or custom printer, must be approved by OpenStax, and proper citation provided.
  • OpenStax-copyrighted images, activities, assessments, and similar components of this book are subject to the same licensing – CC-BY-NC-SA. They can be used for noncommercial purposes with attribution. Commercial use requires permission.
  • Permission requests: Anyone who intends to incorporate this content (including text, images, and other components) into large language models, use it in AI offerings, use it commercially (including in print), and/or has questions about another use case is welcome to complete our reuse request form.
Attribution information
  • If you are redistributing all or part of this book in a noncommercial print format, then you must include on every physical page the following attribution:

    Access for free at https://openstax.org/books/physics/pages/1-introduction

  • If you are redistributing all or part of this book in a noncommercial digital format, then for every page that includes OpenStax content, you must license the derivative work under the same CC-BY-NC-SA license as the original, and include on every digital page view the following attribution:

    Access for free at https://openstax.org/books/physics/pages/1-introduction

Citation information

The information below includes the information needed to generate citations in most major styles (APA, MLA, etc.); you must reformat and organize the information as needed to fit the requirements of the style. Use the information below to generate a citation. We recommend using a citation tool such as this one.

© Jul 8, 2026 Texas Education Agency (TEA). The OpenStax name, OpenStax logo, OpenStax book covers, OpenStax CNX name, and OpenStax CNX logo, and Rice University name, and Rice University logo trademarks, or wordmarks are not subject to the Creative Commons license and may not be reproduced without the prior and express written consent of Rice University.