Resistance between two opposite faces of square thin film of area 1 mm^2 having thickness of 1micrometer if resistivity of material is 10^-6 will be? A) 1000 ohm B) 100 ohm C) 1 ohm D) 10 ohm
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Answer:
The resistance is 1 ohm.
Explanation:
Given data:
Area, A = 1 mm²
Resistivity, ρ = 10⁻⁶ Ωm
Thickness, t = 1 µm = 10⁻⁶ m
To find: Resistance, R
We know,
Area = L * t ……(i)
And,
R = (ρ * L) / A ….. (ii)
Putting values of (i) in (ii), we get
R = (ρ*L) / (L * t)
Or, R = ρ / t
Or, R = 10⁻⁶ Ωm / 10⁻⁶ m
Or, R = 1 Ω
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