A potential difference of 14 V is found to produce a current of 0.45 A in a 3.8 m length of wire with a uniform radius of 0.36 cm. Find the following values for the wire: (a) the resistance Omega (b) the resistivity Omega * m

Aphroditeoq 2022-07-21 Answered
A potential difference of 14 V is found to produce a current of 0.45 A in a 3.8 m length of wire with a uniform radius of 0.36 cm. Find the following values for the wire:
(a) the resistance Ω
(b) the resistivity Ω m
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Answers (1)

Shelby Strong
Answered 2022-07-22 Author has 9 answers
We know that Resistance
R=V/I
And resistivity p=RA/L
a) Resistance
R = V I = 14 0.45 R = 31.11 Ω
b) ρ = R A L ρ = π x ( 0.36 × 10 2 ) 2 × 31.11 3.8 ρ = 3.3 × 10 4 Ω m
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