Home
Class 11
PHYSICS
One end of a string of length L and cros...

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity `omega` such that the string makes an angle `theta` with the vertical. Young's modulus is Y.
The increase `DeltaL` in length of the string is

A

`(TL)/(AY)`

B

`(mgL)/(AY costheta)`

C

`(mgL)/(AY sintheta)`

D

`(mgL)/(AY )`

Text Solution

Verified by Experts

The correct Answer is:
A, B
Promotional Banner

Topper's Solved these Questions

  • ELASTICITY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Integer answer Type)|5 Videos

  • ELASTICITY

    CHHAYA PUBLICATION|Exercise EXAMINATION ARCHIVE WITH SOLUTIONS (WBCHSE)|6 Videos

  • ELASTICITY

    CHHAYA PUBLICATION|Exercise ENTRANCE CORNER (Multiple correct answer type)|6 Videos

  • DOPPLER EFFECT IN SOUND

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|2 Videos

  • EXPANSION OF GASES

    CHHAYA PUBLICATION|Exercise CBSE Scanner|1 Videos

Similar Questions

Explore conceptually related problems

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity omega such that the string makes an angle theta with the vertical. Young's modulus is Y. The angular velocity omega is equal to

One end of a string of length L and cross sectional area A is fixed to a support and the other end is fixed to a bob of mas m. The bob is revolved in a horizontal circle of radius r with an angular velocity omega such that the string makes an angle theta with the vertical. Young's modulus is Y. The tension T in the string is

A pendulum bob of mass m , carrying a charge q is at rest with its string making an angle theta with the vertical in a uniform horizontal electric field E. the tension in the string is

A copper wire of negligible mass of length 1 m and cross sectional area 10^-6 m^2 is kept on a smooth horizontal table with one end fixed. A ball of mass 1 kg is attached to the other end. The wire and the ball are revolving with an angular velocity of 20 rad.s^-1 . IF the elongation in the length of the wire is 10^-3m , obtain the Young's modulus. IF on increasing the angular velocity to 100 rad .s^-1 the wire breaks down, obtain the breaking stress.

Effective length of a pendulum is 50 cm and the mass of the bob is 4g . The bob is drawn to one side until the string is horizontal , and is then released. When the string makes an angle 60^@ with the vertical , what is the velocity and the kinetic energy of the bob ?

Awire of length L and cross section A is made of material of Young's modulus Y. It is stretched by an amount x. The work done is