Question

A carbon resistor is 3 mm long and has a constant cross-section of 0.3 mm2. The...

A carbon resistor is 3 mm long and has a constant cross-section of 0.3 mm2. The conductivity of carbon at room temperature is σ = 3 ✕ 104 per ohm·m. In a circuit its potential at one end of the resistor is 14 volts relative to ground, and at the other end the potential is 19 volts. Calculate the resistance R and the current I.

Science   Physics   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
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
Similar Questions
You have a cylindrical 20 Ω carbon resistor (ρ=5x10-5 Ω m) that is 1.0 cm long...
You have a cylindrical 20 Ω carbon resistor (ρ=5x10-5 Ω m) that is 1.0 cm long and has a cross section area of 0.1 mm2. The resistor is connected to a 5 V battery. Part 1: What is the resistance of the resistor if its area is doubled? Part 2: By what factor does the power dissipated by the resistor change if the resistor length is halved and the battery voltage is doubled? Part 3: By what factor does the...
An iron wire of 10 m long with a cross section area of 2.0 mm2 is...
An iron wire of 10 m long with a cross section area of 2.0 mm2 is used to support a 400-kg load.  Its elongation is (in mm)    (a) 1.5   (b) 9.8    ( c) 15.8  (d) 37.9  ΔL/Lo =(F/A)/Y A wire 10 m long with a cross section area of 3 mm2 stretches by 12 mm when a 500-kg mass was suspended from it.  The Young’s modulus for this wire  is (in Pa)   (a) 1.5   (b) 9.8     ( c) 15.8     (d) 37.9                                        Y = (F/A)/(ΔL/Lo) When a pressure of 3 MPa is...
A copper wire of cross sectional area A=1.7 mm2 and Lenght L=1 m carries a current...
A copper wire of cross sectional area A=1.7 mm2 and Lenght L=1 m carries a current of I=6.4 A at the temperature of T1= 20 0C. a) How many electrons pass through a cross section of the wire in each second? b) What is the resistance of the wire ? c) What is the potential difference between the ends of the wire? d) What is the resistance of the wire at the temperature of T2= 100 0C? (r=1.7x10-8 W.m, a=7x10-3...
If V = 2 V, L = 2 cm, W = 1 cm, H = 0.3...
If V = 2 V, L = 2 cm, W = 1 cm, H = 0.3 cm, and material conductivity σ=5 S/m, a. Calculate the electric field in the resistor (assume uniform throughout). b. Calculate the force on a single electron. c. Calculate the material resistivity (conductivity is given). Report your answer in Ω-cm. d. Using your answer from (a), and knowing J=σE, calculate the current density flowing in the resistor. e. Calculate the resistance of the resistor. f. Using...
3.) 3A.) A 14-cm long nichrome wire is connected across the terminals of a 1.5 V...
3.) 3A.) A 14-cm long nichrome wire is connected across the terminals of a 1.5 V battery. If the current in the wire is 1.4 A , what is the wire's diameter? 3B.) What is the resistance of A 90.0 cm long piece of carbon with a 0.700 mm ×× 0.700 mm square cross section?
A copper wire has a square cross section 3.0 mm on a side. The wire is...
A copper wire has a square cross section 3.0 mm on a side. The wire is 3.8 m long and carries a current of 3.5 A. The density of free electrons is 8.5×1028m−3. A) Find the magnitude of the electric field in the wire. Express your answer in volts per meter. B) How much time is required for an electron to travel the length of the wire? Express your answer in seconds
Calculate the resistance of a pure silicon wire, 3 cm long, and with a cross sectional...
Calculate the resistance of a pure silicon wire, 3 cm long, and with a cross sectional area of 2 mm x 2 mm, at room temperature. Repeat for a sample of silicon with the same geometry but doped with arsenic to a concentration of 10^18 cm^3. Assume that the carrier mobilities are 1500 cm2/Vs and 450 cm2/Vs for electrons and holes, respectively.
A toroidal core of relative permeability ?? = 3000, has a mean radius R = 80...
A toroidal core of relative permeability ?? = 3000, has a mean radius R = 80 mm and a circular cross section with radius b = 25 mm. An airgap ?? = 3 mm exists, and a current I flows in a 500-turn winding to produce a magnetic flux of 10−5 Wb, as shown in Figure Q2(a). Neglecting flux leakage and using mean path length, find: 1. The reluctances of the air gap and the iron core 2. ?? and...
Ms Aaliyah Abimbola; a 56-year old female who emigrated from Africa 20 years ago. Ms Abimbola...
Ms Aaliyah Abimbola; a 56-year old female who emigrated from Africa 20 years ago. Ms Abimbola is a single parent with three female children, ages 14, 17 and 18. You are working on the respiratory ward and have been allocated to Ms Abimbola who has been admitted with exacerbation of COPD. Ms Abimbola presented to A&E via ambulance at 8AM after experiencing acute shortness of breath while preparing breakfast this morning. Based on the information provided in this case study,...
Ms Aaliyah Abimbola; a 56-year old female who emigrated from Africa 20 years ago. Ms Abimbola...
Ms Aaliyah Abimbola; a 56-year old female who emigrated from Africa 20 years ago. Ms Abimbola is a single parent with three female children, ages 14, 17 and 18. You are working on the respiratory ward and have been allocated to Ms Abimbola who has been admitted with exacerbation of COPD. Ms Abimbola presented to A&E via ambulance at 8AM after experiencing acute shortness of breath while preparing breakfast this morning. Background information for the assignment. You are the RN...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT