Estimate the resistance R of a standard (not high-speed) phone charging cable

Question

Question

Answer 1

Answer #1

Standard phone chargers have output of 5V ----- 2A

Since current = Voltage / Resistance

therefore, Resistance = voltage / current = 5/2 = 2.5ohms

Answer 2

Answer #2

Expression for the resistance is, Assume the wires are made of copper and the resistivity of copper is, ρ 1.7x10-8 Ω-m Area o

Answer 3

Similar Homework Help Questions

15. Estimate the resistance ? of a standard (not a high-speed) phone charging cable. ?=_____Ω 19....

15. Estimate the resistance ? of a standard (not a high-speed) phone charging cable. ?=_____Ω 19. A certain single ion channel is selectively permeable to K+ and has a resistance of 1.15 GΩ , therefore a current of potassium ions through the channel is possible. During an experiment, the channel is open for approximately 1.50 ms while the voltage across the channel is maintained at 89.5 mV . How many K+ ions travel through the channel during this time? number...
. If you are designing a transformer for a cell phone charging cable and need to...

. If you are designing a transformer for a cell phone charging cable and need to step down the voltage from the primary coil to the secondary by half, which coil should have more turns O The primary coil should have more turns O The secondary coil should have more turns O The two coils should have the same number of turns 8. From one coil of a transformer to another, which of the following quantities ALWAYS stays constant (does...
What is the time constant for charging an inductance L through a resistance R? (a) LR...

What is the time constant for charging an inductance L through a resistance R? (a) LR (b) L/R (c) R/L (d) RLC

Estimate the resistance R of the coils in a toaster

Estimate the resistance R of the coils in a toaster
6 (30) A long coaxial cable is perfectly conducting tubes (zero resistance) of radii a and...

6 (30) A long coaxial cable is perfectly conducting tubes (zero resistance) of radii a and b, where a < b. One end of constructed from two R the cable is connected to the two terminals of a resistance R, and the other connected to a battery of emf E (a) Find the energy density u, of the magnetic field in the cable. (b) Using any method you choose, obtain the self-inductance per unit length of the cable. S. (c)...
The average wind speed is 6 m/s at a 10-m-high anemometer. Estimate the average power density...

The average wind speed is 6 m/s at a 10-m-high anemometer. Estimate the average power density in the wind at a height of 80 m. Assume Rayleigh statistics, a standard friction coefficient α = 1/7, and standard air density ρ = 1.225 kg/m3.

Suppose you currently pay $45/ month to the phone company for telephone service; $90/month to the...

Suppose you currently pay $45/ month to the phone company for telephone service; $90/month to the cable company for cable TV; and $50/month to an Internet Service Provider for high-speed Internet access. You learn that you can bundle all these services with the cable company for one monthly fee of $148. What percentage savings is that?
An unknown resistance (R.) can be measured m terms of a standard (R, ) using this...

An unknown resistance (R.) can be measured m terms of a standard (R, ) using this device, which is called a Wheatstone bridge
A group of engineers developed a new design for a steel cable. They need to estimate...

A group of engineers developed a new design for a steel cable. They need to estimate the amount of weight the cable can hold. The weight limit will be reported on cable packaging. The engineers take a random sample of 48 cables and apply weights to each of them until they break. The 48 cables have a mean breaking weight of 773.7 lb. The standard deviation of the breaking weight for the sample is 15.8 lb. Find the 99% confidence...

A group of engineers developed a new design for a steel cable. They need to estimate...

A group of engineers developed a new design for a steel cable. They need to estimate the amount of weight the cable can hold. The weight limit will be reported on cable packaging. The engineers take a random sample of 50 cables and apply weights to each of them until they break. The 50 cables have a mean breaking weight of 778.9 lb. The standard deviation of the breaking weight for the sample is 15.6 lb. Find the 95% confidence...