Hook's law defines
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  • 1
    When compared with solids and liquids, the gases have
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  • 2
    A steel wire of diameter $2 \,mm$ has a breaking strength of $4 \times 10^5 \,N$.the breaking force ......... $\times 10^5 \,N$ of similar steel wire of diameter $1.5 \,mm$ ?
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  • 3
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  • 4
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  • 5
    $Assertion :$ Hollow shaft is found to be stronger than a solid shaft made of same equal material.
    $Reason :$ Torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same length and material.
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  • 6
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  • 7
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    The diagram shows the change $x$ in the length of a thin uniform wire caused by the application of stress $F$ at two different temperatures $T_1$ and $T_2$. The variations shown suggest that
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  • 9
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