Explanation:
Current output at the battery will be current of entire circuit, while the current through each bulb in the parallel circuit is the total current circuit.
So, current output through power supply is i and current through each component be  considering only three component.
 considering only three component.
Then in a parallel circuit 

 
        
             
        
        
        
Answer:
umm section 2 and 4
Explanation:
 because at section 2 it starts and at section 4 it moves again and stops at 3.
 
        
             
        
        
        
Answer:
It increases.
Explanation:
For the electron to escape the photon needs energy is equal to the difference between initial and its non quantised region energy , then only it will be able to escape finite well. 
E ∝ n^2
n= energy state quantum number 
so if , n increases maximum point of probability density increases. 
 
        
             
        
        
        
There must be a conducting wire and electromotive force or free electrons