A non-conducting, non-magnetic cylindrical object of mass m and carrying a static charge of Q is placed inside a long solenoid that is carrying a constant current I. Both the solenoid and the cylindrical object are

A current I runs through a square loop with length . Show that the magnitude of magnetic field at the center is B = 2√2μol πl

A conductor is moving to left direction in a region where uniform magnetic field is directed ino the page. Which point of the conductor (a or b) is at higher potential?

The figure below shows a long conducting coaxial cable and gives its radii (R₁ = 4.78cm, R₂-6.5cm, R3-16cm). The inner cable has a uniform current density of J = 5.1 A/m², and the outer cable carries a uniform current I = 2.1A flowing in opposite direction. Assume that the currents in each wire is uniformly distributed over its cross section. Determine the magnitude of the magnetic field in terms of po at a distance r = 12.5cm from the center of the cable. Express your answer using four decimal places. R2 R3 I

Two long, parallel, current-carrying wires lie in an xy-plane. The first wire lies on the line y = 0.400 m and carries a current of 25.0 A in the +x direction. The second wire lies along the x-axis. The wires exert attractive forces on each other, and the force per unit length on each wire is 290 μN/m. What is the y-value (in m) of the line in the xy-plane where the total magnetic field is zero? .207 Use the right-hand rule to determine the possible location of a point where the magnetic field is zero. Write an expression for the force of attraction between the wires, find expressions for the magnetic fields due to each wire at the point, and set them equal. Use your expression for the force per unit length to eliminate one of the currents, and solve for the required distance. m