Question

Calculate the resistance
of an aluminium wire
of length 60cm and
cross-s
rectional
area
1 mm². The specific
resistance aliminius
is 2.68 10-8 som
of​

Answer 1

Answer:

its length – the longer the wire, the greater its resistance.

its cross-sectional area A – the greater the area, the less its resistance.

the resistivity of the material r – the greater the resistivity, the greater its resistance.

Answer 2

Hi,

Here is your answer

Given:

Length of wire(l)=60cm=0.6m

Area of cross section(A)=1mm²=1×10⁻⁶m²

Resistivity(ρ)=2.68×10⁻⁸ohm-m

To Find:

Resistance(R)

Solution:

Resistance is given by the equation

R=ρl/A

Substituting thr given datas, we get

R=2.68×10⁻⁸×0.6/10⁻⁶

R=1.608×10⁻²Ω

Notes:

1. Remember to convert all the give datas to their SI units before calculating.

2.The factors affecting resistance of a conductor are

• Temperature
• Nature of the conductor
• Length of the conductor
• Area of cross section

Hope this helps you.