Question

-1 A 4m long wire of cross-sectional area 2.5 X 10 m² has a resistance of 5. The conductivity of the wire is (a) 2.5 X 10' m (b) 4.0 X 10' m (c) 2.5 X 10'' m¹ -1 -1 (d) 4.0 X 10''m'​

Answer 1

3.2
`10^(-2) ohm^(-1) m^(-1)`

Step-by-step explanation:

Resistance=5 ohm

Length=4m

Cross sectional area=2.5 x 10

Conductivity = 1/ resistivity

=
`(length)/(resistance x cross sectional area)`

Conductivity=4 /5 x 2.5 x 10

Conductivity=4/125

Conductivity=3.2x
`10^(-2)`
`ohm^(-1) m^(-1)`