Home
Class 11
PHYSICS
A wire elongates by 1mm when a load w is...

A wire elongates by 1mm when a load w is hanged from it if the wire goes over a pulley and 2 weights w each are hung at the 2 ends. What will be the elongation of wire in mm?

Text Solution

Verified by Experts

Young's modulus, `Y = (W)/(A) xx (L)/(l)`
`:.` elongation, `l = (WL)/(AY)`
on either side of wide, tension is w but length is `(l)/(2)` `:.` elongation produced along either side `= (l)/(2)mm`
Total elongation produced `= (l)/(2) + (l)/(2) = 1mm`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • PROPERTIES OF MATTER

    SURA PUBLICATION|Exercise Value based Questions|5 Videos

  • PROPERTIES OF MATTER

    SURA PUBLICATION|Exercise Numerical Problems|13 Videos

  • OSCILLATIONS

    SURA PUBLICATION|Exercise VALUE BASED QUESTIONS|2 Videos

  • PUBLIC EXAM QUESTION PAPER MARCH-2019

    SURA PUBLICATION|Exercise Part-IV|10 Videos

Similar Questions

Explore conceptually related problems

A wire elongates by 1.0 mm when a load W is hanged from it. If this wire goes over a pulley and two weights W each are hung at the two ends the elongation of the wire will be

When a metal wire elongates by hanging a load on it, the gravitational potential energy is decreased. What does that mean?

If the length of a wire increases by 1mm under 1kgwt. Then what will be the nature of the wire under 100kgwt.?

If the length of a wire increases by 1mm under 1kgwt. Then what will be the nature of the wire under 100kgwt.?

A wire is stretched by 0.01 m when it is stretched by certain force. Another wire of the same material but double the length and double the diameter is stretched by the same force. What is the elongation in metres ?

Two wires A and B of length l, radius r and length 2l, radius 2r having same Youngs modulus Y are hung with a weight mg. What is the net elongation in the two wires?

Two wires A and B of length l, radius r and length 2l, radius 2r having same Young's modulus Y are hung with a weight mg. What is the net elongation in the two wires?

Two wires A and B are made of same material. The wire A has a length l and diameter r while the wire B has a length 2l and diameter r/2. If the two wires are stretched by the same force the elongation in A divided by the elongation in B is

Two blocks of masses 1 kg and 2kg are connect by a metal wire going over a smooth pulley as shown in figure. The breaking stress of the metal is 2xx10^9Nm^-2 . What should be the minimum radius of the wire used if it is not to break? Take g=10ms^-2

Two wire A & B are of the same metal and are of same length have area of cross section in the ratio of 2:1 If the same potential difference is applied across each wire. What will be the ratio of the current flowing through the wires A & B ?

Home
Profile