Answer:
 0.0133A
Explanation:
Since we have two sections, for the Inductor region there would be a current  . In the case of resistance 2, it will cross a current
. In the case of resistance 2, it will cross a current  
 
Defined this we proceed to obtain our equations,
For  ,
,


For  ,
,


The current in the entire battery is equivalent to,


Our values are,




Replacing in the current for t= 0.4m/s



 
        
             
        
        
        
Explanation:
For each object, the initial potential energy is converted to rotational energy and translational energy:
PE = RE + KE
mgh = ½ Iω² + ½ mv²
For the marble (a solid sphere), I = ⅖ mr².
For the basketball (a hollow sphere), I = ⅔ mr².
For the manhole cover (a solid cylinder), I = ½ mr².
For the wedding ring (a hollow cylinder), I = mr².
If we say k is the coefficient in each case:
mgh = ½ (kmr²) ω² + ½ mv²
For rolling without slipping, ωr = v:
mgh = ½ kmv² + ½ mv²
gh = ½ kv² + ½ v²
2gh = (k + 1) v²
v² = 2gh / (k + 1)
The smaller the value of k, the higher the velocity.  Therefore:
marble > manhole cover > basketball > wedding ring
 
        
             
        
        
        
Step-#1:
Ignore the wire on the right.
Find the strength and direction of the magnetic field at P, 
caused by the wire on the left, 0.04m away, carrying 5.0A 
of current upward. 
Write it down.
Step #2:
Now, ignore the wire on the left.
Find the strength and direction of the magnetic field at P, 
caused by the wire on the right, 0.04m away, carrying 8.0A 
of current downward. 
Write it down. 
Step #3:
Take the two sets of magnitude and direction that you wrote down
and ADD them.
The total magnetic field at P is the SUM of (the field due to the left wire)
PLUS (the field due to the right wire).
So just calculate them separately, then addum up.
 
        
             
        
        
        
Current is inversely proportional to the resistance of the resistor and directly to the potential difference across it.
I = V/R = 6/12 = 0.5 A
        
             
        
        
        
Answer: s=d/t= 500/7.0=71.42 m/s
Explanation: