A wheel of radius r having conducting rim and n no. of conducting spokes, rotates in a plane perpendicular to uniform magnetic field B with constant angular speed `omega`. Prove that emf induced between centre and rim of a wheel is `1/2BomegaR^2`

One metallic ring of radius 2 m has a conducting rod connected between centre and rim of wheel. It rotates in a plane perpendicular to uniform magnetic field 1 T with frequency 25"rev"/s . Find emf induced across the rod.

One metallic ring of radius 1 m has a conducting rod connected between centre and rim of wheel. It rotates in a plane perpendicular to uniform magnetic field 2 T with frequency 100"rev"/s . Find emf induced across the rod.

A wheel having n conducting concentric spokes is rotating about it geometrical axis with an angular velocity omega , in a uniform magnetic field B perpendicular to its plane prove that the induced emf generated between the rim of the wheel and the center is (omegaBR^2)/2 , where R is the radius of the wheel. It is given that the rim of the wheel is conducting.

A wheel of radius 2m having 8 conducting concentric spokes is rotating about its geometrical axis with an angular velocity of 10 rad/s in a uniform magnetic field of 0.2T perpendicular to its plane. The value of induced emf between the rim of the wheel and centre is ......... V

Radius of a conducing wire r and its plane is perpendicular to magnetic field B. If the conductors is stretched and made in shape of square in its plane and in time t, then induced a emf epsilon is _____

One U shaped conducting frame is placed in a plane perpendicular to uniform magnetic field B. One conducting rod of mass m and length l is kept perpendicular to parallel sides of this frame. At time t = 0, this rod is pushed perpendicular to its length with initial velocity v_g . Prove that its velocity at the end of time t is v_t=v_0 "exp" ((-B^2l^2)/(mR)t) where R=resistance of external circuit and l=perpendicular distance between two parallel slides .

A line charge lambda per unit length is lodged uniformly onto the rim of a wheel of mass M and radius R. The wheel has light nonconducting spokes and is free to rotate without friction about its axis as per figure. A uniform magnetic field extends over a circular region within the rim. It is given by, B=-B_0 k ( r le a , a lt R) =0 (otherwise) What is the angular velocity of the wheel after the field is suddenly switched off ?

A thin uniform circular disc of mass M and radius R is rotating in a horizontal plane about an axis passing through its centre and perpendicular to the plane with n angular velocity omega another disc of one forth mass and same dimension is gently placed over it coaxially, the angular speed of the composite disc will be ............