Question

explain why does a metal wire when connected to a cell offer resistence to the flow of current

Answer 1

There are free electrons which moves randomly in metallic wire in absence of electric field.
When u apply electric field they starts accelerating from negative to positive terminals colliding each other and due to their collision there is an opposition offered by electrons to the flow of current known as resistance.

Answer 2

Question:

Explain why does a metal wire when connected to a cell offer resistance to the flow of current.

Answer:

• A metal wire when connected to a cell offer resistance to the flow of current because nothing in this world is 100% completed or pure.
• No metal wire is a pure conductor nor any insulator is pure insulator.
• The best conductor wire is silver but silver wire also have resistance of 1.6 × 10^-8 ohm at the temperature of 20° C.