A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 A current. What is...

A 2.0 mm -diameter, 50 cm -long copper wire carries a 4.5 A current. What is the potential difference between the ends of the wire?

Expert Solution

First find Resistance R = l / (A)

A = /4 (Diameter)² Diameter =2.0 cm = 0.02 meters

= /4 ( 0.02 )²

= 3.145 10^-4 m²

Resistivity of copper = 1.68 10^-8 Ohm-meter

l = length of wire in meters

R = l / (A) = 1.68 10^-8 0.5 / ( 3.145 10^-4)

= 2.671 10^-5 Ohms

Potential difference between the end of the wire V = I R

= 4.2 2.671 10^-5

V = 1.212 10^-4 volts

genius_generous answered 1 year ago

A copper wire with diameter of 1,5 mm and length of 4m carries constant current of...

A copper wire with diameter of 1,5 mm and length of 4m carries constant current of 1.75 A. The free electron density in the wire is 8,5x1028 m-3. The resistivity of copper is 1,72x10-8 .m. Calculate a) current density, b)drift velocity, c) magnitude of electric field, d) potential between the terminals of wire, e)power dissipated as heat f) mean free time. (mass of electron: 9,1x10-31kg, magnitude of charge of electron: 1,6x10-19 C)

Two long straight parallel wires are 11 cm apart. Wire A carries 2.0-A current. Wire B's...

Two long straight parallel wires are 11 cm apart. Wire A carries 2.0-A current. Wire B's current is 5.0 A in the same direction. Determine the magnetic field magnitude due to wire A at the position of wire B. Determine the magnetic field due to wire B at the position of wire A Are these two magnetic fields equal and opposite? Determine the force per unit length on wire A due to wire B. Determine the force per unit length...

A copper transmission cable 100 km long and 10.0 cm in diameter carries a current of...

A copper transmission cable 100 km long and 10.0 cm in diameter carries a current of 125 A. The copper resistivity is1.72 × 10-8 Ω.m. (a) What is the potential drop across the cable? (b) How much electrical energy is dissipated as thermal energy per hour? (c) What temperature increase is required to increase the cable resistance by 5.00% ? [Thermal resistivity coefficient of copper at 25 deg C is 0.00393 (°C)-1]

Q4. A copper transmission cable 100 km long and 10.0 cm in diameter carries a current...

Q4. A copper transmission cable 100 km long and 10.0 cm in diameter carries a current of 125 A. The copper resistivity is 1.72 × 10-8 Ω.m. (a) What is the potential drop across the cable? (b) How much electrical energy is dissipated as thermal energy per hour? (c) What temperature increase is required to increase the cable resistance by 5.00% ? [Thermal resistivity coefficient of copper at 25 deg C is 0.00393 (°C)-1]

A wire made from tungsten is 4.5 m long and 0.45 mm in diameter. What is...

A wire made from tungsten is 4.5 m long and 0.45 mm in diameter. What is its resistance at 1500°C?

If 47.0 cm of copper wire (diameter = 1.00 mm) is formed into a circular loop...

If 47.0 cm of copper wire (diameter = 1.00 mm) is formed into a circular loop and placed perpendicular to a uniform magnetic field that is increasing at a constant rate of 10.5mT/s, at what rate is thermal energy generated in the loop? _______________ W

A copper wire has a diameter of 3.247 mm. What magnitude of current flows when the...

A copper wire has a diameter of 3.247 mm. What magnitude of current flows when the drift velocity is 4.40 mm/s? Take the density of copper to be 8.92 g/cm3. Give your answer in Amperes. PLEASE PLEASE PLEASE answer correctly

A wire 80 cm long carries 11 A of current. From this wire, a loop of...

A wire 80 cm long carries 11 A of current. From this wire, a loop of 90-turns is made and placed in a magnetic field of 6.50 Tat an angle of 35˚. In first experiment, a square loop is formed and in the second experiment, a circular loop is formed with same number of turns. Calculate the torque in each loop. Which loop produces more torque-the circular loop or the square loop? What is the reason for this change of...

A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There...

A 0.500 mm diameter copper wire makes up a 136 turns, 7.60 cm diameter coil. There is a magnetic field parallel to the axis of the coil. If the induced current in the coil is 2.80 A, what is the rate of change of the magnetic field? a) 0.0839 T/s b) 3.63×10-6 T/s c) 12.8 T/s d) 1.74×103 T/s

A 2.8 mm -diameter copper wire carries a 31 Acurrent (uniform across its cross section). A)...

A 2.8 mm -diameter copper wire carries a 31 Acurrent (uniform across its cross section). A) Determine the magnetic field at the surface of the wire. B) Determine the magnetic field inside the wire, 0.50 mm below the surface. C) Determine the magnetic field outside the wire 2.5 mm from the surface.

Question