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If 140cm long and 0.08mm wire registence 21ohm than find registance
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1 Answer

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Resistance = Resistivity ×Length / Area

Resistivity = 21 ohm/m=21×10-03 ohm/mm

Length=140cm long=1400mm

Area=π/4(diameter)2=π/4(0.08)2

=5.024×10-03mm2

​​​​Resistance= 21×10-03×1400/(5.024×10-03)

=5852 ohm (approximately)

by (26.6k points)

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