Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Properties of Matter question

2013 · Q144
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Physics
  4. /Properties of Matter
  5. /2013 · Q144

Properties of Matter question

2013 · Q144

NEETPhysicsProperties of MatterMCQ+4 / −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
  1. A
    (5q7sp2)\left( {{{5q} \over {7s{p^2}}}} \right)(7sp25q​)
  2. B
    (7q5sp2)\left( {{{7q} \over {5s{p^2}}}} \right)(5sp27q​)
  3. C
    (2q5sp)\left( {{{2q} \over {5sp}}} \right)(5sp2q​)
  4. D
    (7q5sp)\left( {{{7q} \over {5sp}}} \right)(5sp7q​)
View written solutionFree

Correct answer: B

From formula,

Increase in length ΔL=FLAY=4FLπD2Y\Delta L = {{FL} \over {AY}} = {{4FL} \over {\pi {D^2}Y}}ΔL=AYFL​=πD2Y4FL​

ΔLSΔLC=FSFC(DCDS)2YCYSLSLC{{\Delta {L_S}} \over {\Delta {L_C}}} = {{{F_S}} \over {{F_C}}}{\left( {{{{D_C}} \over {{D_S}}}} \right)^2}{{{Y_C}} \over {{Y_S}}}{{{L_S}} \over {{L_C}}}ΔLC​ΔLS​​=FC​FS​​(DS​DC​​)2YS​YC​​LC​LS​​

=75×(1p)2(1s)q=7q(5sp2) = {7 \over 5} \times {\left( {{1 \over p}} \right)^2}\left( {{1 \over s}} \right)q = {{7q} \over {\left( {5s{p^2}} \right)}}=57​×(p1​)2(s1​)q=(5sp2)7q​

PreviousNext

More from Properties of Matter

  • 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…2013 · MCQ
  • A fluid is in streamline flow across a horizontal pipe of variable area of cross section. For this which of the following statements is correct?2013 · MCQ
  • The density of water at 20oC is 998 kg/m3 and at 40oC is 992 kg/m3. The coefficient of volume expansion of water is2013 · MCQ
  • A piece of iron is heated in a flame. It first becomes dull red then becomes reddish yellow and finally turns to white hot. The correct explanation for the above observation is possible by using2013 · MCQ
  • The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv, respectively. If γ = Cv​Cp​​ and R is the universal gas constant, then Cv is equal to2013 · MCQ
  • The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?2013 · MCQ
  • The wettability of a surface by a liquid depends primarily on2013 · MCQ
  • A slab of stone of area 0.36 m2 and thickness 0.1 m is exposed on the lower surface to steam at 100oC. A block of ice at 0oC rests on the upper surface of the slab. In one hour 4.8 kg of ice is melted. The thermal conductivity of slab is…2012 · MCQ