Cell phones are technology that is popular throughout the world. would this technology be of use in rural areas of the world

Explanation:

Cell phone is not only a device to set up a call, but it also provides various features now a days which keeps us connected to the world. It even help one to learn by providing various means of applications.

This technology is mostly used in urban area as they are equipped with wifi connectivity and antennas. If rural areas are provided with such technologies and  advancement, then cell phones are well suited for such areas.

The advancement in technology in terms of mobile is vast and connects people through out the world.

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

none, its a machine