Figure shows the top view of a rod that can slide without friction....

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Figure shows the top view of a rod that can slide without friction. The resistor is \( 6.0 \Omega \) and a \( 2.5 \mathrm{~T} \) uniform magnetic field is directed perpendicularly downward into paper. If length of moving rod is \( 1.2 \mathrm{~m} \) and it moves with a constant speed of \( 2 \mathrm{~m} / \mathrm{s} \) then the rate at which energy is delivered to the resistor is
(1) \( 12 \mathrm{~W} \)
(2) \( 6 \mathrm{~W} \)
(3) \( 3 \mathrm{~W} \)
(4) \( 20 \mathrm{~W} \)
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