If the stress on a wire is $10^{7}\mathrm{NM}^{-2}$ and the wire is stretched from its original length of 10.00m to 10.05m. The young's modulus of the wir...

Assessment: JAMB UTME - Physics - 2021 Subject: Physics

Question 1 Report

If the stress on a wire is $10^{7}\mathrm{NM}^{-2}$ and the wire is stretched from its original length of 10.00m to 10.05m. The young's modulus of the wire is?

5.0 x 10

^{- 4}

Nm

^{- 2}

5.0 x 10

^{- 5}

Nm

^{- 2}

2.0 x 10

^{- 8}

Nm

^{- 2}

2.0 x 10

^{9}

Nm

^{- 2}

Answer Details

Young's modulus $\frac{s t r e s s}{s t r a i n}$

Strain = $\frac{e}{l} = \frac{0.05}{10} = \frac{10^{7}}{0.005}$

2 x 10 $^{9}$ Nm $^{- 2}$

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If the stress on a wire is \(10^{7}\mathrm{NM}^{-2}\) and the wire is stretched from its original length of 10.00m to 10.05m. The young's modulus of the wir...

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