Respuesta :
Answer:
Just consider the resistance as water flowing through a pipe. If the pipe is too small in radius (consider thin wire as small pipe) water can’t flow easly. If the pipe is big in radius (consider thick wire as big pipe) water can flow easly. So flowing water through a small pipe for a long distance will inversly affect the normal flow where as flowing water through a big pipe for a small distance will not affect too much the normal flow.
So long & thin wire has high resistance. Short & thick wire has low resistance.
B. A wire that is 2 m long and has a cross-sectional area of 0.066
B. A wire that is 2 m long and has a cross-sectional area of 0.066
cm
What is resistance ?
Resistance is the opposition that a substance offers to the flow of electric current. It is represented by the uppercase letter R.
Resistance of a material = rho * [tex]\frac{length}{area}[/tex]
taking option A and B
so here , it can be observed that length is constant
since , area is inversely proportional to resistance of the material
wire which have lower area of cross section will have more resistance
since option B) wire have lesser area of cross-section hence , it will have higher resistance
taking option C and option D
similarly , option D) wire will have high resistance because of lower area of cross section
now comparing option B and D
cross section area is same
and resistance is directly proportional to length
length of option B is more than option D hence ,
B. A wire that is 2 m long and has a cross-sectional area of 0.066 cm will have highest resistance of all
learn more about resistance :
https://brainly.com/question/11431009?referrer=searchResults
#SPJ2
