Question

1. A wire of radius 0.28 mm has a length of 3.3 cm. It is made of a material of specific
resistance 1.4 x 10-61 cm. Find the resistance of wire.​

Answer 1

Answer:

ANSWER

Given, Diameter=0.5mm,resistivity=1.6×10−8Ω−m,resistance=10Ω

we know that R=ρA1⇒1=ρRA

Where A is the area of the cross-section,

=1.6×10−810×3.14×(20.0005)2=122.7m

Thus the length of the wire is 122.7m