Explanation:
The quantity of charge Q in coulombs (C) that has passed through a point in a wire up to time t (measured in seconds) is given by :

We need to find the current flowing. We know that the rate of change of electric charge is called electric current. It is given by :

At t = 1 s,
Current,

So, the current at t = 1 s is 3 A.
For lowest current,

Hence, this is the required solution.
  
        
             
        
        
        
<span>Force = Work done / distance = 4Nm / 2m = 2N</span>
        
                    
             
        
        
        
Answer:
B
Explanation:
The control is something that is meant to not be changed, the control is a comparison of the experimental. 
 
        
             
        
        
        
To increase the rate of dissolving you can stir the concentration, heat the mixture, or grind the solute.