Home
Class 12
PHYSICS
A disc of mass m has a charge Q distribu...

A disc of mass `m` has a charge `Q` distributed on its surface. It is rotating about an `XX'` with a angular velocity `omega`. The force acting on the disc is

A

zero

B

`omegaRB//pi`

C

`2QomegaBR`

D

none of these

Text Solution

Verified by Experts

Since there is no interaction of disc with the magnetic field, the force acting on the disc is zero.
Promotional Banner

Topper's Solved these Questions

  • MAGNETIC

    FIITJEE|Exercise Numerical Based Type|2 Videos

  • MAGNETISM AND MATTER

    FIITJEE|Exercise ASSIGNMENT PROBLEMS OBJECTIVE : (LEVEL -II) (MULTI CHOICE SINGLE CORRECT)|20 Videos

Similar Questions

Explore conceptually related problems

A thin disc of radius R has charge Q distributed uniformly on its surface. The disc is rotated about one of its diametric axis with angular velocity omega . The magnetic moment of the arrangement is

A thin annular disc of outer radius R and R/2 inner radius has charge Q uniformly distributed over its surface. The disc rotates about its axis with a constant angular velocity omega . Choose the correct option(s):

Consider a nonconductiing disc of radius r and mass m which has a charge q distributed uniformly over it. The disk is rotated about its axis with an angluar speed omega .Magnetic moment of the disc is 1/Nqomegar^(2) .then find value of N .

A non-conducting thin disc of radius R charged uniformly over one side with surface density s rotates about its axis with an angular velocity omega . Find (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc.

A conducting ring of radius R has charge Q distributed unevenly over it. If it rotates with an angular velocity omega , the equivalent current will be

A non-conducting thin disc of radius R and mass m having charge uniformly over one side with surface density sigma rotates about its axis with an angular velocity omega . Find : (a) the magnetic induction at the centre of the disc, (b) the magnetic moment of the disc. ( c) the ratio of magnetic moment and angular momentum of disc.

A non-conducting thin disc of radius R charged uniformly over one side with surface density sigma , rotates about its axis with an angular velocity omega . Find (a) the magnetic field induction at the centre of the disc (b) the magnetic moment of the disc.

A disc is rotating with angular velocity omega . If a child sits on it, what is conserved?