Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
tutors
pricing
login
X
ASK
Home
>>
JEEMAIN and NEET
>>
Physics
>>
Class11
>>
Mechanical Properties of Solids
Two rods of equal length are in parallel with area in the ratio 3 : 4 and young modulus in the ratio 5 : 3.The ratio of force on the rods is
$\begin{array}{1 1}(A)\;5 : 4\\(B)\;20 : 9\\(C)\;9 : 20\\(D)\;4 : 5\end{array} $
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
Share
asked
May 8, 2014
by
sreemathi.v
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1 Answer
In parallel the extension is same so
$\Delta l_1=\Delta l_2$
$(\large\frac{F_1}{a_1})\frac{l}{Y_1}=(\large\frac{F_2}{a_2})\frac{l}{Y_2}$
$\large\frac{F_1}{F_2}=\frac{a_1Y_1}{a_2Y_2}$
$\Rightarrow \large\frac{3}{4}\times \frac{5}{3}$
$\Rightarrow \large\frac{5}{4}$
Hence (A) is the correct answer.
answered
May 8, 2014
by
sreemathi.v
Please
log in
or
register
to add a comment.
Related questions
2 wires of radius in ratio 1 : 2 have young modulus in ratio 2 : 3.Equal force is applied on them ,what is the ratio of elastic potential energy
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 8, 2014
by
sreemathi.v
1
answer
A golden ring of radius 0.5cm and cross section area $2mm^2$ is shifted to a wooden of disk of radius 8cm.If young modulus is $3\times 10^{10}N/m^2$,what is force along its length?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 8, 2014
by
sreemathi.v
1
answer
2 wire of length 1 : 2 and area in the ratio 2 : 1 is applied with equal force stretch equally .Find the ratio of modulus of rigidity
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 7, 2014
by
sreemathi.v
1
answer
A 50KN force is applied on a table,the length of four legs of table is 2m each and of radius 5cm.If young modulus of material of table is $5\times 10^{10}N/m^2$.Find the decrease in length in a leg of table.
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 7, 2014
by
sreemathi.v
1
answer
A steel wire of l=15m and r=1mm is stretched by a unknown force F.If young modulus of steel wire is $2.4\times 10^{11}N/m^2$ and change in length is $5\times 10^{-2}mm$
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
easy
asked
May 7, 2014
by
sreemathi.v
1
answer
Two wires of radii in the ratio 2 : 3,lengths in the ratio 3 : 5.Forces applied in the ratio 5 : 7 with young modulii in the ratio 3 : 4.The change in length is in the ratio
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
medium
asked
May 8, 2014
by
sreemathi.v
1
answer
A rubber catapult has a cross sectional area $2mm^2$ and total unstretched length 15cm.It is stretched to 18cm and then released to project a missile of 3g.Taking young modulus $8\times 10^8N/m^2$ find velocity of projection?
jeemain
physics
class11
ch9
ch10
properties-of-solids-and-liquids
difficult
asked
May 8, 2014
by
sreemathi.v
1
answer
Ask Question
Tag:
Math
Phy
Chem
Bio
Other
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
JEEMAIN
350+ TESTS
NEET
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
...
X