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The conducting rod ab shown in figure ma...

The conducting rod `ab` shown in figure makes contact with metal rails `ca` and `db`. The apparatus is in a uniform magnetic field `0.800 T`, perpendicular to the plane of the figure.

(a) Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed `7.50 m//s`.
(b) In what direction does the current flow in the rod?
(c) If the resistance of the circuit abdc is `1.50 Omega` (assumed to be constant), find the force (magnitude and direction) required to keep the rod moving to the right with a constant speed of `7.50 m//s`. You can ignore friction.
(d) Compare the rate at which mechanical work is done by the force `(Fu)` with the rate at which thermal energy is developed in the circuit `(I^2R)`.

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