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A metal bar with length L , mass m and ...

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).

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