Question

a thick wire has low resistance give reasons​

Answer 1

Answer:

The longer a wire is the more resistance it has due to the longer path the electrons have to flow along to get from one end to the other. The larger the cross sectional area, the lower the resistance since the electrons have a larger area to flow through

Explanation:

Resistance is the property of an element to oppose the flow of electrons when a potential difference is applied across it.

Consider two wires,one with smaller cross section area and another with comparatively larger area.Now larger area means more free space(atoms are mostly vacuum) and less opposition,as collision with other atoms and electrons decreases.so,electron flow in wire with small area experiences more resistance as compared to that of wire with larger area.

Mathematically,

R=(L/A)*rho

Where R=resistance,L=length of the wire,A=area of cross section,rho=resistivity

Thus,keeping length constant(rho is constant for a material) we can see that resistance is inversely proportional to area of cross section.

So we can conclude that resistance decreases with increase in area provided length of the wire and temperature remains same.

Hope it helps

thank you

Answer 2

Answer:

hope it helps u

Explanation:

Thiner wire has lower electrons to carry current but thick wire doestnt .