Yes they are the power goes from one to another and if one goes off another will go off too
I think b is the right one
The part of the cerebrum that controls Voluntary movements is located in the Frontal lobe.
Answer: 
Explanation:
Given
Cross-sectional area of wire 
Extension of wire 
Extension in a wire is given by

where, 

for same force, length and material

Divide (i) and (ii)
