To produce a magnetic field of 0.0020T0.0020T, what current is required in a 500-turn solenoid that is 25cm25cm long?

The current is

Explanation:

From the question we are told that

   The magnetic field is  

    The number of turns is  

     The length of the solenoid is

Generally the magnetic field is mathematically represented as

Here   is the permeability of free space with value

=>    

=>    

=>    

force is mass*acceleration.

we have a very small mass: 11.4*0.001 kg

if we want 0.035n of force, we need an acceleration:

0.035 = 11.4*0.001*a

a = 0.035/(11.4*0.001) m/s^2

area of focus