AIPMT 2014 | Properties of Matter Question 50 | Physics

Copper of fixed volume V is drawn into wire of length $$l$$. When this wire is subjected to a constant force F, the extension produced in the wire is $$\Delta $$$$l$$. Which of the following graphs is a straight line ?

$$\Delta $$$$l$$ versus 1/$$l$$

$$\Delta $$$$l$$ versus $$l$$²

$$\Delta $$$$l$$ versus 1/$$l$$²

$$\Delta $$$$l$$ versus $$l$$

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

If the ratio of diameters, lengths and Young's modulus of steel and copper wires shown in the figure are p, q and s respectively, then the corresponding ratio of increase in their lengths would be

NEET 2013 (Karnataka) Physics - Properties of Matter Question 53 English

NEET 2013 (Karnataka) Physics - Properties of Matter Question 53 English

$$\left( {{{5q} \over {7s{p^2}}}} \right)$$

$$\left( {{{7q} \over {5s{p^2}}}} \right)$$

$$\left( {{{2q} \over {5sp}}} \right)$$

$$\left( {{{7q} \over {5sp}}} \right)$$

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)

-1

Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are K₁ and K₂ and cross sectional areas A₁ and A₂, respectively. If the rate of heat conduction in 1 is four times that in 2, then

K₁A₁ = 4K₂A₂

K₁A₁ = 2K₂A₂

4K₁A₁ = K₂A₂

K₁A₁ = K₂A₂

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