A solenoid used to produce magnetic fields for research purposes is 2.2 mm long, with an inner radius of 30 cmcm and 1200 turns of wire. When running, the solenoid produced a field of 1.4 TT in the center. Given this, how large a current does it carry?

The current is  

Explanation:

From the question we are told that

    The length of the solenoid is  

    The  radius is  

    The number of turn is

    The  magnetic field is  

The  magnetic field produced  is mathematically represented as

         

making the subject

       

Where   is the permeability of free space with values

 substituting values

       

       

The moon would appear much larger in the sky. the moon directly affects the ocean tides. If it were much closer, the ocean would rise and flood coastal areas. If the moon were much farther away from Earth, then the ocean tides would quit and the oceans would stagnate, killing all plant and marine life.