Home
Class 12
PHYSICS
A constant torque acting on a uniform ci...

A constant torque acting on a uniform circular disc changes its angular momentum from L to 4L/3 in 2 seconds. Then the magnitude of the torque applied is

A

`L//3`

B

`2L//3`

C

`3L//2`

D

`L//6`

Text Solution

Verified by Experts

Doubtnut Promotions Banner Mobile Dark
|

Similar Questions

Explore conceptually related problems

A constant torque acting on a uniform circular wheel changes its angular momentum from A to 4A in 4 second, then the magnitude of the torque is

A torque of 50 Nm acts on a rotating body for 5 s. Its angular momentum

A solid sphere of diameter 25cm and mass 25kg rotates about an axis through its centre. Calculate its moment of inertia, if its angular velocity changes from 2 rad s^-1 to 12 rads^-1 in 5 seconds. Also calculate the torque applied.

Solid sphere of diameter 25 cm and mass 25 kg rotates about an axis through its center. Calculate its moment of inertia , if its angular velocity changes from 2 rad/s to 12 rad/s in 5 second. Also calculate the torque applied.

A particle of mass m is moving in a plane along a circular path of radius r . Its angular momentum about the axis of rotation is L . The centripetal force acting on the particle is.

A current i flows in a circular coil of radius r . If the coil is placed in a uniform magnetic field B with its plane parallel to the field, magnitude of the torque that acts on the coil is

A paticle of mass m is executing uniform circular motion on a path of radius r . If p is the magnitude of its linear momentum, then the radial force acting on the particle is

A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of 60^@ with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil from turning.

If the solenoid in the previous question is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied, what is the magnitude of torque on the solenoid when its axis makes an angle of 30^@ with the direction of applied field?

A particleof mass 20 kgexecuting uniform circular motion on a path of radius 4.5 m. If the 30 kg m//s is the magnitude of linear momentum, then the radial force acting on the particle is

Home
Profile