Thank you Constants The conducting rod ab shown in the figure (Figure 1)makes co

Question

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Constants The conducting rod ab shown in the figure (Figure 1)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 Part D Find the direction of the force required to keep the rod moving to the right with a constant speed of 7.50 m/s upward downward O to the right Figure 1 of 1 to the left SubmitPrev ious Answers Request Answer X Incorrect, Try Again; 5 attempts remaining al ???? 50.0 cm ? Part E Compare the rate at which mechanical work is done by the force (Fv) with the rate at which thermal energy is developed in the circuit (1 R) equal

Explanation / Answer

D) ;Length of rod along = j or - j

Magnetic field=along - k

Force on a current carrying rod by magnetic field is given by

F=i l x B

When length is along negative j

F=i l(-j)B(-k)

F=ilb(-j x-k) =ilB(i)

So magnetic force on the rod is along i or positive x direction. In order to keep velocity constant, net force must be zero

So we will apply external force opposite to the magnetic force

Or in negative x direction or towards left.

If lenght of rod is taken along j, then we have force along

F=ilB(j x-k=-i)

F=ilB along negative x direction and so we will apply force along positive x direction or towards right to make net force equal to zero.

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