An air-core solenoid with 2000 loops is 60 cm long and has a diameter of 2 cm. If a current of 5 A is sent through it, the magnetic flux density within its core will be approximately:

A solenoid has a magnetic field of 18.84 mT, and the number of turns per unit length is 500 turns/m. Calculate the current if the core is air.

A solenoid of length 80 cm carries a current of 0.8 A. Using the ideal long solenoid approximation, calculate the number of turns required to produce a magnetic field strength H = 600 AT/m at its center.