HomeworkLib
Question

Problem 31.40 When you step on the brake pedal in your car, charge carriers flow from...

Problem 31.40

When you step on the brake pedal in your car, charge carriers flow from the battery to the rear brake lights. Suppose the wire connecting the switch at the pedal to the brake lights is made of copper and has a diameter of 1.1 mm .

Part A

If the current through the wire is 2.0 A , how long on average does it take an electron to travel from the switch at the pedal to one of the brake lights? The number density of free electrons in copper is n = 8.4 ×1028 electrons/m3.Suppose that the length of the wire is 3 m.

science   physics   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
Problem 31.40 When you step on the brake pedal in your car, charge carriers flow from...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • When you step on the brake pedal in your car, charge carriers flow from the battery...

    When you step on the brake pedal in your car, charge carriers flow from the battery to the rear brake lights. Suppose the wire connecting the switch at the pedal to the brake lights is made of copper and has a diameter of 1.3 mm . Part A If the current through the wire is 2.0 A , how long on average does it take an electron to travel from the switch at the pedal to one of the brake...

  • the emf provided by the battery is 12.6 V 1 Current Density and Drift Speed a)...

    the emf provided by the battery is 12.6 V 1 Current Density and Drift Speed a) (8 pts) A group of charges, each with charge q, moves with velocity v. The number of particles per unit volume is n. What is the current density J of these charges, in magnitude and direction? Make sure that your answer has units of Alm b) (8 pts) We want to calculate how long it takes an electron to get from a car battery...

  • Help please Current Density and Drift Speed A group of charges, each with charge q, moves...

    Help please Current Density and Drift Speed A group of charges, each with charge q, moves with velocity v^vector. The number of particles per unit volume is n. What is the current density J^vector of these charges, in magnitude and direction? Make sure that your answer has units of A/m^2. We want to calculate how long it takes an electron to get from a car battery to the starter motor after the ignition switch is turned. Assume that the current...

  • I just need help with Part D, thank you in advance. A copper wire has a...

    I just need help with Part D, thank you in advance. A copper wire has a square cross section 2.02 mm on a side. The wire is 4.81 m long and carries a current of 4. 34 A The density of free electrons is 8.5 x 1028 m3 Part A Find the magnitude of the current density in the wire. Express your answer using three significant figures. J= 1.06x106 A/m2 Previous Answers Submit Correct Part B Find the magnitude of...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT