All AP Physics C Electricity Resources
Example Questions
Example Question #2 : Calculating Circuit Power
A battery is measured to have a potential of 5V. When connected to a wire with no resistors or other components, the voltage measured is 4.9V.
If the current through the wire is measured to be 2A, how much thermal energy is being lost per second as soon as the wire is connected to the battery?
Possible Answers:
Correct answer:
Explanation:
First, we must know that the wire has some internal resistance . To calculate this, we need to know the potential drop through the wire, which must be the difference we saw from the initial voltage reading to the second. This value, 0.1V, we plug into Ohm's law to calculate the resistance of the wire.
The question asks for energy lost per second; this value is equivalent to the power.
Use our values to solve.
Dilip
Certified Tutor
Certified Tutor
University of Calcutta, Bachelor of Science, Physics. Indiana Institute of Technology, Master of Science, Physics.
All AP Physics C Electricity Resources
Popular Subjects
Spanish Tutors in Atlanta, Reading Tutors in Atlanta, LSAT Tutors in Seattle, Spanish Tutors in Denver, Chemistry Tutors in San Francisco-Bay Area, MCAT Tutors in Miami, English Tutors in San Diego, English Tutors in Boston, ACT Tutors in Phoenix, GMAT Tutors in Washington DC
Popular Courses & Classes
GMAT Courses & Classes in Los Angeles, GMAT Courses & Classes in Denver, Spanish Courses & Classes in Seattle, LSAT Courses & Classes in Los Angeles, SAT Courses & Classes in Los Angeles, ACT Courses & Classes in New York City, Spanish Courses & Classes in Boston, GRE Courses & Classes in Los Angeles, ACT Courses & Classes in Dallas Fort Worth, SSAT Courses & Classes in Dallas Fort Worth
Popular Test Prep
ACT Test Prep in Dallas Fort Worth, GMAT Test Prep in Denver, SSAT Test Prep in Houston, LSAT Test Prep in New York City, MCAT Test Prep in Los Angeles, LSAT Test Prep in Houston, ACT Test Prep in New York City, ACT Test Prep in Washington DC, LSAT Test Prep in Phoenix, LSAT Test Prep in Miami