A 8.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 90-cm-long nichrome wire....

Question

Question

A 8.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 90-cm-long nichrome wire. What is the current in the wire?

Answer 1

Answer #1

Area

A=pi*D²/4 =pi*(0.8*10^-3)²/4 =5.0265*10^-4m²

Resistance of the wire is

R=pL/A =(1.5*10^-6)(0.9)/(5.0265*10^-4)

R=2.68574 ohms

Current flowing in the wire is

I=V/R =8/2.68574

I=2.9787 A

Answer 2

Similar Homework Help Questions

A 5.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 85-cm-long nichrome wire....

A 5.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 85-cm-long nichrome wire. What is the current in the wire? resistivity of nichrome is 1.5*10^-6 (I think, if im wrong use something else)
A 2.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 80-cm-long nichrome wire....

A 2.0 V potential difference is applied between the ends of a 0.80-mm-diameter, 80-cm-long nichrome wire. Part A What is the current in the wire? Express your answer using two significant figures.
A 6.0V potential difference is applied between the ends of a 0.80-mm-diameter, 40-cm-long nichrome wire.

A6.0V potential difference is applied between the ends of a 0.80-mm-diameter, 40-cm-long nichrome wire. Part A What is the current in the wire?

A 7.5 V potential difference is applied between the ends of a 0.70-mm-diameter, 50-cm-longnichrome wire. What...

A 7.5 V potential difference is applied between the ends of a 0.70-mm-diameter, 50-cm-longnichrome wire. What is the current in the wire? Express your answer using two significant figures.
What is the current in the wire?

A 5.0 V potential difference is applied between the ends of a 0.60-mm-diameter, 90-cm-long nichrome wire. Part AWhat is the current in the wire? Express your answer in amperes.
A wire 3.66 m long and 6.77 mm in diameter has a resistance of 21.7 m?....

A wire 3.66 m long and 6.77 mm in diameter has a resistance of 21.7 m?. A potential difference of 17.5 V is applied between the ends. (a) What is the current in amperes in the wire? (b) What is the magnitude of the current density? (c) Calculate the resistivity of the material of which the wire is made. (a) Number Units (b) Number Units (c) Number Units A wire 3.66 m long and 6.77 mm in diameter has a...

When a potential difference of 12 V is applied to a wire 6.6 m long and...

When a potential difference of 12 V is applied to a wire 6.6 m long and 0.32 mm in diameter the result is an electric current of 2.1 A . What is the resistivity of the wire?
When a potential difference of 12 V is applied to a wire 6.6 m long and...

When a potential difference of 12 V is applied to a wire 6.6 m long and 0.33 mm in diameter the result is an electric current of 2.0 A . 1. What is the resistivity of the wire?
A 1.0 mm -diameter, 20 cm -long copper wire carries a 4.5 A current. What is...

A 1.0 mm -diameter, 20 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire?

A 1.5 mm -diameter, 20 cm -long copper wire carries a 4.5 A current. What is...

A 1.5 mm -diameter, 20 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire? in mV