[" A nonconducting ring of mass "m" and radius "R" is charged as shown.The charged "],[" density i.c.charge per unit length is "lambda" .It is then placed on a rough "],[" nonconducting horixontal surfacc planc.At time "t=0" ,a uniform clectric "],[" field "I=E_(0)i" is switched on and the ring start rolling without sliding."],[" Determine the friction force (magnitude and direction) acting on the ring,"],[" when it stans moving."]

A nonconducting ring of mass m and radius R is charged as shown. The charged density i.e. charge per unit length is lambda . It is then placed on a rough nonconducting horizontal surface plane. At time t = 0, a uniform electric field vecE=E_(0)hati is switched on and the ring starts rolling without sliding. The friction force (magnitude and direction) acting on the ring, when it starts moving is

A nonconducting ring of mass m and radius R, with charge per unit length lambda is shown in fig. It is then placed on a rough nonconducting horizontal plane. At time t=0, a uniform electric field vecE =E_(0)hati is switched on and the ring starts rolling without sliding. Determine the friction force (magnitude and direction ) acting on the ring.

A nonconducting ring of mass m and radius R, with charge per unit length lambda is shown in fig. It is then placed on a rough nonconducting horizontal plane. At time t=0, a uniform electric field vecE =E_(0)hati is switched on and the ring starts rolling without sliding. Determine the friction force (magnitude and direction ) acting on the ring.

A nonconducting ring of mass m and radius R, with charge per unit length lambda is shown in fig. It is then placed on a rough nonconducting horizontal plane. At time t=0, a uniform electric field vecE =E_(0)hati is switched on and the ring starts rolling without on and the ring starts rolling without sliding. Determine the friction froce (magnitude and direction ) acting on the ring.

A non conducting solid sphere of mass m and radius R having uniform charge density +rho and -rho as shown in figure. It is then placed on a rough non conducting horizontal plane. At t=0 a uniform electric field vecE=E_(0)hati N//C is switched on and the solid sphere starts rolling with sliding. The magnitude of frictional force at t=0 is (2rhopiR^(3)E_(0))/K . Find the value of K

A non conducting solid sphere of mass m and radius R having uniform charge density +rho and -rho as shown in figure. It is then placed on a rough non conducting horizontal plane. At t=0 a uniform electric field vecE=E_(0)hati N//C is switched on and the solid sphere starts rolling with sliding. The magnitude of frictional force at t=0 is (2rhopiR^(3)E_(0))/K . Find the value of K

A non - conducting ring of mass m = 4 kg and radius R = 10 cm has charge Q = 2 C uniformly distributed over its circumference. The ring is placed on a rough horizontal surface such that the plane of the ring is parallel to the surface. A vertical magnetic field B=4t^(3)T is switched on at t = 0. At t = 5 s ring starts to rotate about the vertical axis through the centre. The coefficient of friction between the ring and the surface is found to be (k)/(24) . Then the value of k is

A non - conducting ring of mass m = 4 kg and radius R = 10 cm has charge Q = 2 C uniformly distributed over its circumference. The ring is placed on a rough horizontal surface such that the plane of the ring is parallel to the surface. A vertical magnetic field B=4t^(3)T is switched on at t = 0. At t = 5 s ring starts to rotate about the vertical axis through the centre. The coefficient of friction between the ring and the surface is found to be (k)/(24) . Then the value of k is

A conducting ring of mass 2kg and radius 0.5m is placed on a smooth plane. The ring carries a current of i=4A . A horizontal magnetic field B=10 T is switched on at time t=0 as shown in fig The initial angular acceleration of the ring will be .