5. A very long, thick cylindrical wire of radius R carries a current density J that varies across its cross-section. The magnitude of the current density at a point a distance r from the center of the wire is given by J = Jo, where Jo is a constant. Find the magnetic field (a) at a point outside the wire and (b) at a point inside the wire. Write your answer in terms of the net current I through the wire.

Consider a wire carrying a current due east in a location where the Earth’s field is due north. A) What is the direction of the force on the wire if both are parallel to the ground?  B) Calculate the force per unit length on the wire, in newtons per meter, if the wire carries 19.5 A and the field strength is 2.85 × 10-5 T.  C) What would the diameter be, in meters, of copper wire (with density ρ = 8.80 × 103 kg/m3) that would have its weight supported by this force in meters?  D)  Calculate the resistance per unit length, in ohms per meter, that this copper wire will have. Copper has a resistivity of ρR = 1.72 × 10-8 Ω⋅m. E) Calculate the potential difference per unit length, in volts per meter, of this wire.

Two long parallel wires hang by 4.00 cm long cords. The wires have a mass per unit length of 0.0125 kg/m and carry the same current in opposite directions. What is the current in each wire if the cord hangs at an angle of 6.00⁰ with the vertical?

i. Two long, parallel wires are separated by 1.49 cm and carry currents of 2.17 A and 3.93 A. Find the magnitude of the attractive force F that acts on a 3.85 m length of either wire. ii. Do the currents run in the same or opposite directions? How do you know?

You have a conductor that is 1.6 meters long that you attach to a 12 V battery. The wire has a resistance of 1.27 ohms. What magnetic field strength in microT would you measure 1.3 cm away from the wire?

A2.1 mm -diameter copper wire carries a 39 Acurrent (uniform across its cross section). Determine the magnetic field at the surface of the wire. Determine the magnetic field inside the wire 0.50 mm below the surface

A = 60 B = 70 C = 170 D = 7

A magnet in the form of a cylindrical rod has a length of 5.96 cm and a diameter of 1.28 cm. It has a uniform magnetization of 5.59 × 103 A/m. What is its magnetic dipole moment? Number i Units

5. A long cylindrical conductor of radius R carries a current I. The current density is non- uniform, and is a function of the radius according to J = br, where b is a constant. Find an expression for the magnetic field for both rR (i.e. inside and outside the conductor). Assume that R is measured from the center of the conductor.

.P y d. d. A constant current I flows in the conducting wires of a right triangular closedloop with perpendicul ar side length d in the direction shown in the figure. What is the magnetic field vector at point P? Hot - 1)k B) Hol (V2-: V2 Hol (VZ A) 4 Ttd 8nd Ttd Ho! V2- Ho! D) 2nd 2 (1 – v2)k E) 2nd V2 için buraya yazZın NR