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]

Expert Solution

genius_generous answered 2 years ago

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 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?

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)

a) Assume that there is a long ideal solenoid with 120 turns/cm. It carries a current...

a) Assume that there is a long ideal solenoid with 120 turns/cm. It carries a current i= 2 A and it has a diameter 2 cm and a length 5 m. Find the uniform magnetic field inside the solenoid. c) Now, construct an RL circuit using an ideal battery that has potential difference 5 V, one resistor with R = 2 Ω and the solenoid that has same shape with one mentioned at part (a). Wait very long time and...

345 kV, 50 Hz, 3-phase transmission line is 100 km long. The resistance is 0.048 Ω/km...

345 kV, 50 Hz, 3-phase transmission line is 100 km long. The resistance is 0.048 Ω/km and the inductance is 1,24 mH/km. The shunt capacitance is 0.0174 μF/km. The receiving end load is 216 MW with 0.8 power factor lagging at 325 kV. (a) Compute ABCD parameters using π equivalent circuit (b) Sending end voltage VS, (c) Sending end current IS, (d) Efficiency

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 long wire with a radius of 0.400 cm carries a current. The potential difference across...

A long wire with a radius of 0.400 cm carries a current. The potential difference across a 3.70 m long section of this wire is 13.0 V, and the wire carries a current of 0.450 A. What is the resistivity (in Ω · m) of the wire?

An 8.00-cm-long piece of wire is formed into a square, and carries a clockwise current of...

An 8.00-cm-long piece of wire is formed into a square, and carries a clockwise current of 0.150 A. The loop is placed inside a solenoid, and the plane of the loop is perpendicular to the solenoid’s magnetic field. The solenoid carries a counterclockwise current of 17.0 A, and has 25 turns per centimeter. What is the force on each side of the loop? Please explain

The inner and outer diameter of a single core cable are 3 cm and 8.5 cm...

The inner and outer diameter of a single core cable are 3 cm and 8.5 cm The insulated with two materials having relative permittivity of 5 and 3.5 respectively with corresponding maximum electric stresses of 35 kV/cm and 25 kV/cm. Draw the configuration and calculate: a) the radial thickness of each insulating layer. b) the safe working voltage of the cable. c) draw the voltage and electric stress as a function of radial distance from center to metal sheath.

A long, straight, copper wire with a circular cross-sectional area of 2.1 mm2 carries a current...

A long, straight, copper wire with a circular cross-sectional area of 2.1 mm2 carries a current of 22 A. The resistivity of the material is 2.00 10-8?

Question