A 28-turn solenoid of length 6.4 cm produces a magnetic field of magnitude 2 mT at its center. Find the current in the solenoid.

A 0.5 m long solenoid has 500 turns and has a flux density of 2.512 X 10-3 T atits center. Find the current in solenoid. Given μ0 = 4π X 10 -7 H/m ,Π =3.14

A single-turn square loop of wire, 2.00 cm on each edge, carries a clockwise current of 0.250 A. The loop is inside a solenoid, with the plane of the loop perpendicular to the magnetic field of the solenoid. The solenoid has 30.0 turns/cm and carries a clockwise current of 15.0 A.(a) Find the force on each side of the loop.magnitude µNdirection (b) Find the magnitude of the torque acting on the loop. N · m

A circular coil of radius 5 × 10-2 m and with 40 turns is carrying a current of 0.25 A. Determine the magnetic field of the circular coil at the center.

A coil of radius 44cm has 7 turns. Find the strength of the magnetic field at its centre, if 5A current flows through the coil. (𝜇𝑜=4𝜋×10−7𝑇𝑚/𝐴μ o​ =4π×10 −7 Tm/A)10×10−5𝑇10×10 −5 T5×10−7𝑇5×10 −7 T5×10−5𝑇5×10 −5 T10×10−7𝑇10×10 −7 T

A solenoid 60 cm long and of radius 4.0 cm has 3 layers of windingsof 300 turns each. A 2.0 cm long wire of mass 2.5 g lies inside thesolenoid (near its centre) normal to its axis; both the wire and theaxis of the solenoid are in the horizontal plane. The wire is connectedthrough two leads parallel to the axis of the solenoid to an externalbattery which supplies a current of 6.0 A in the wire. What value ofcurrent (with appropriate sense of circulation) in the windings ofthe solenoid can support the weight of the wire? g = 9.8 m s–2.