Metallic(noferrmagnetic) and nometallic particles in a solid waste may be separted as follows. The wasts is allowed to slide down an inclin over permanent magnets. The metallic particles slow down as compared to the nonmetallic ones and hence are separted. Discuss the role of eddy currents in the process.

A metallic rod of mass per unit length 0.5 kg m^(-1) is lying horizontally on a smooth inclined plane which makes an anlge of 30^(@) with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary

A metallic rod of mass per unit length 0.5 kg m^(-1) is lying horizontally on a straght inclined plane which makes an angle of 30^(@) with the horizontal. The rod is not allowed to slide down by flowing a current throguh it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is

A metal bar with length L , mass m and resistance R is polaced on frictionless metal rails that are inclined at an angle phi above the horizontal. The rails have negiligible resistance. There is a uniform magnetic field of nagnitude B direction download in the figure. The bar is released from rest and slide down the rails. (a) Is the direction of the current induced in the bar from a and b or b to a ? (b) What is the terminal speed of the bar ? What is the induced current in the bar when the terminal speed has been reached ? (d) After the terminal speed has been reached, at what rate is electrical energy being converted to thermal energy in the resistance of the bar ? (e) After the terminal speed has been reached, at what rate is work being done on the bar by gravity? Compare your answer to that in part (d).