We are open Saturday and Sunday!

Call Now to Set Up Tutoring:

(888) 888-0446

AP Physics 1 : Circuits

Study concepts, example questions & explanations for AP Physics 1

Create An Account

All AP Physics 1 Resources

7 Diagnostic Tests 170 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #1 : Ohm's Law

Consider the circuit:

Circuit_4

If each resistor has a value of $2\Omega$ , how much current is flowing through the circuit?

Possible Answers:

48A

24A

12A

Correct answer:

24A

Explanation:

First we need to calculate the equivalent resistance of the circuit using the following expression for condensing parallel resistors:

$\frac{1}{R_{eq}}=\sum\frac{1}{R} = \frac{1}{2\Omega}+\frac{1}{2\Omega}+\frac{1}{2\Omega}+\frac{1}{2\Omega}$

$R_{eq}=0.5\Omega$

Now we can use Ohm's law to calculate the current flowing through the circuit:

V = IR

$I = \frac{V}{R}=\frac{12V}{0.5\Omega} = 24A$

Report an Error

Example Question #1 : Circuits

A light bulb requires 60 W to function properly. If it is connected to a powersupply of 120 A and functions properly, then what is the resitance of the light bulb?

Possible Answers:

$1m\Omega$

$7m\Omega$

$4m\Omega$

$1\Omega$

$0.5\Omega$

Correct answer:

$4m\Omega$

Explanation:

First, identify the given information:

P=60W

I=120A

Two equations are required for this problem:

1.) Ohm's law, V=IR

2.) Electrical power P=IV

Using the equation for electrical power, we can rearrange to solve for :

P=IV

$V=\frac{P}{I}$

At this point, we can substitute in the known values and determine the voltage:

$V=\frac{60W}{120A}=0.5V$

Ohm's law can then be rearranged to solve for the resistence of the light bulb:

V=IR

$R=\frac{V}{I}$

The known voltage value then can be substituted into Ohm's law to determine the resistance of the light bulb:

$R=\frac{0.5V}{120A}=0.00416\Omega\approx 4m\Omega$

Report an Error

Example Question #1 : Ohm's Law

What is the resistance of a resistor if the current going through it is and the voltage across it it is 10V ?

Possible Answers:

$0.2\Omega$

$20\Omega$

$5\Omega$

$12\Omega$

Correct answer:

$5\Omega$

Explanation:

Use Ohm's law.

V=IR

Plug in known values and solve for resistance.

$R=\frac{10V}{2A}=5\Omega$

Report an Error

Example Question #31 : Electricity

What is the voltage across a resistor with a resistance of $10\Omega$ that has a current of 20A going through it?

Possible Answers:

200V

30V

20V

Correct answer:

200V

Explanation:

Use Ohm's Law.

V=IR

$V=20A\cdot10\Omega =200V$

Report an Error

Example Question #1 : Circuits

What is the current through a resistor if the resistor has a resistance of $40\Omega$ and the voltage across the resistor is 60V ?

Possible Answers:

46A

24A

1.5A

Correct answer:

1.5A

Explanation:

Use Ohm's law.

V=IR

$I=\frac{60V}{40\Omega}=1.5A$

Report an Error

Example Question #1 : Circuits

If the current through a $10\Omega$ resistor is , what is the voltage across the resistor?

Possible Answers:

10V

$\frac{5}{3}V$

60V

Correct answer:

60V

Explanation:

UseOhm's law.

V=IR

Plug in known values and solve.

$V=6A\cdot 10\Omega$

V=60V

Report an Error

Example Question #41 : Electricity

Basic circuit

$V_{in}=12V$

I=2 A

The voltage measured from a point between Z_1 and Z_2 to the ground is

What is the resistance of Z_1 ?

Possible Answers:

$2\Omega$

$4\Omega$

$3\Omega$

$12\Omega$

$1\Omega$

Correct answer:

$2\Omega$

Explanation:

Begin by finding the total resistance in the circuit.

$R_{tot}=\frac{V}{I}=\frac{12V}{2A}=6\Omega$

Now note that the voltage identified in the problem is the same as the voltage drop across the second resistor:

IZ_2=V_D

$Z_2=\frac{V_D}{I}=\frac{8V}{2A}$

$Z_2=4\Omega$

Now, since Z_1 and Z_2 combine to form the total resistance:

$Z_1=Z-Z_2=6\Omega -4\Omega=2\Omega$

Report an Error

Example Question #1 : Ohm's Law

Basic circuit

$V_{in}=12V$

I=2 A , and the voltage measured from a point between Z_1 and Z_2 to the ground is

In the circuit above, what is the resistance of Z_2 ?

Possible Answers:

$6\Omega$

$4\Omega$

$1\Omega$

$12\Omega$

$2\Omega$

Correct answer:

$4\Omega$

Explanation:

Begin by finding the total resistance in the circuit.

$R_{tot}=\frac{V}{I}=\frac{12V}{2A}=6\Omega$

Now note that the voltage identified in the problem is the same as the voltage drop across the second resistor:

IZ_2=V_D

$Z_2=\frac{V_D}{I}=\frac{8V}{2A}$

$Z_2=4\Omega$

Report an Error

Example Question #1 : Ohm's Law

Basic circuit

$V_{in}=12V$

Z_1 is composted of two resistors in parallel, $3\Omega$ and $7\Omega$

Z_2 is a single $6\Omega$ resistor.

In the circuit above, what is the current?

Possible Answers:

1.20A

2.96A

1.48A

0.75 A

1.50 A

Correct answer:

1.48A

Explanation:

To find the current, first find the total resistance of the circuit. Begin by simplifying Z_1 , the two resistors in parallel as follows:

$\frac{1}{Z_1}=\frac{1}{3\Omega}+\frac{1}{7\Omega}$

$\frac{1}{Z_1}=\frac{10}{21\Omega}$

$Z_1=2.1\Omega$

Since Z_1 and Z_2 are in series, their combined resistance is:

$R_{tot}=Z_1+Z_2=2.1\Omega+6\Omega=8.1\Omega$

Use Ohm's law to find the current.

$I=\frac{V}{R}$

$I=\frac{12V}{8.1\Omega}$

I=1.48A

Report an Error

Example Question #1 : Ohm's Law

A resistor with a resistance of $4 \Omega$ has a current flowing through it of 5A. What is the potential drop across the resistor?

Possible Answers:

10V

$\frac{2}{5}V$

$\frac{5}{2}V$

20 V

Correct answer:

20 V

Explanation:

Ohm's law states that the potential drop across a resistor is equal to the product of the current flowing through the resistor and the resistance of the resistor:

V=IR

We were given the current, I, and the resistance, R, so we simply multiply the two together to get our final answer.

V=5*4=20V

Report an Error

View AP Physics 1 Tutors

Pankaj
Certified Tutor

University of Delhi, Electrical Engineer, Electrical Engineering. Columbia University in the City of New York, Master of Arts...

View AP Physics 1 Tutors

Magdy
Certified Tutor

Cairo University, Egypt, Bachelor of Science, Electrical Engineering. New Mexico State University-Main Campus, Doctor of Phil...

View AP Physics 1 Tutors

Corrina
Certified Tutor

Massachusetts Institute of Technology, Bachelor of Science, Mechanical Engineering.

All AP Physics 1 Resources

7 Diagnostic Tests 170 Practice Tests Question of the Day Flashcards Learn by Concept

Popular Subjects

English Tutors in Los Angeles, LSAT Tutors in New York City, Math Tutors in Chicago, Computer Science Tutors in Philadelphia, SSAT Tutors in San Diego, Algebra Tutors in Phoenix, Spanish Tutors in Boston, Biology Tutors in Houston, ACT Tutors in Denver, Reading Tutors in Phoenix

Popular Courses & Classes

LSAT Courses & Classes in Atlanta, SAT Courses & Classes in Houston, ISEE Courses & Classes in San Diego, SSAT Courses & Classes in Seattle, GRE Courses & Classes in Dallas Fort Worth, GMAT Courses & Classes in Chicago, LSAT Courses & Classes in Phoenix, LSAT Courses & Classes in Philadelphia, GRE Courses & Classes in Miami, GMAT Courses & Classes in Atlanta

Popular Test Prep

SSAT Test Prep in Seattle, ISEE Test Prep in Washington DC, GMAT Test Prep in Atlanta, SAT Test Prep in Boston, GRE Test Prep in Denver, SSAT Test Prep in Washington DC, GMAT Test Prep in Miami, GRE Test Prep in Houston, SAT Test Prep in Seattle, LSAT Test Prep in Seattle

DMCA Complaint

If you believe that content available by means of the Website (as defined in our Terms of Service) infringes one or more of your copyrights, please notify us by providing a written notice (“Infringement Notice”) containing the information described below to the designated agent listed below. If Varsity Tutors takes action in response to an Infringement Notice, it will make a good faith attempt to contact the party that made such content available by means of the most recent email address, if any, provided by such party to Varsity Tutors.

Your Infringement Notice may be forwarded to the party that made the content available or to third parties such as ChillingEffects.org.

Please be advised that you will be liable for damages (including costs and attorneys’ fees) if you materially misrepresent that a product or activity is infringing your copyrights. Thus, if you are not sure content located on or linked-to by the Website infringes your copyright, you should consider first contacting an attorney.

Please follow these steps to file a notice:

You must include the following:

A physical or electronic signature of the copyright owner or a person authorized to act on their behalf; An identification of the copyright claimed to have been infringed; A description of the nature and exact location of the content that you claim to infringe your copyright, in \ sufficient detail to permit Varsity Tutors to find and positively identify that content; for example we require a link to the specific question (not just the name of the question) that contains the content and a description of which specific portion of the question – an image, a link, the text, etc – your complaint refers to; Your name, address, telephone number and email address; and A statement by you: (a) that you believe in good faith that the use of the content that you claim to infringe your copyright is not authorized by law, or by the copyright owner or such owner’s agent; (b) that all of the information contained in your Infringement Notice is accurate, and (c) under penalty of perjury, that you are either the copyright owner or a person authorized to act on their behalf.

Send your complaint to our designated agent at:

Charles Cohn Varsity Tutors LLC
101 S. Hanley Rd, Suite 300
St. Louis, MO 63105

Or fill out the form below:

Do not fill in this field

Contact Information

* Full legal name

Company name

* Phone number

* Email address

Address

* Address1

Address2

* City

* State

* Zipcode

* Country

Complaint Details

* URL of copyrighted work (where your original material is located)

* Please describe the copyrighted work so that it may be easily identified

I am the owner, or an agent authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.

I have a good faith belief that the use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law.

This notification is accurate.

I acknowledge that there may be adverse legal consequences for making false or bad faith allegations of copyright infringement by using this process.

* Signature (your digital signature is legally binding)

HIGH SCHOOL

GRADUATE SCHOOL

K-8

Search 50+ Tests

math tutoring

science tutoring

foreign languages

elementary tutoring

other

Search 350+ Subjects

AP Physics 1 : Circuits

Study concepts, example questions & explanations for AP Physics 1

All AP Physics 1 Resources

Example Questions

Example Question #1 : Ohm's Law

Example Question #1 : Circuits

Example Question #1 : Ohm's Law

Example Question #31 : Electricity

Example Question #1 : Circuits

Example Question #1 : Circuits

Example Question #41 : Electricity

Example Question #1 : Ohm's Law

Example Question #1 : Ohm's Law

Example Question #1 : Ohm's Law

All AP Physics 1 Resources

Report an issue with this question

DMCA Complaint

Contact Information

Address

Complaint Details

Email address:
Your name:
Feedback: