Question

Which has more resistance and why?
a)A long piece of copper wire or short wire

Answer 1

Answer:

Long piece of Copper wire

Explanation:

A long piece of copper wire has more resistance than short wire. This is because in long wire electrons have to flow along a longer path

Hope it helps you

Answer 2

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We know that,

Resistance = Resistivity×Length/Area

R = ρL/A

Hence,

R ∝ L   or

Resistance is directly proprtional to Length  ie,

if length increases then resistance increases and

if length decreases then resistance decreases

Hence,

the longer wire will have more resistance than the shorter wire

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