The resistivity of a resistor is 5 ohm-m. Its length is 1m and area of cross section is $2 m m^{2}$ . Find the resistance?

2 M Ω

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2.5 M Ω

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4 M Ω

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5 M Ω

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Solution

The correct option is B $2.5 M Ω$
Given $ρ$ , l and A, we have a direct relation to find resistance.
$R = \frac{ρ l}{A} R = 5 \times \frac{1}{(2 \times (10^{- 3})^{2})} R = 2.5 M Ω$

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The resistivity of a resistor is 5 ohm-m. Its length is 1m and area of cross section is 2mm2. Find the resistance?

The correct option is B 2.5MΩGiven ρ, l and A, we have a direct relation to find resistance. R=ρlAR=5×1(2×(10−3)2)R=2.5MΩ

The resistivity of a resistor is 5 ohm-m. Its length is 1m and area of cross section is $2 m m^{2}$ . Find the resistance?

The correct option is B $2.5 M Ω$
Given $ρ$ , l and A, we have a direct relation to find resistance.
$R = \frac{ρ l}{A} R = 5 \times \frac{1}{(2 \times (10^{- 3})^{2})} R = 2.5 M Ω$