The figure below shows a conducting oar moving along conducting rails in the pre

Q: The figure below shows a conducting oar moving along conducting rails in the pre

Statement B is incorrect. The force on the moving bar due to the magnetic field point in the direction OPPOSITE of motion. The direction can be seen by F = i (dl x B) (right hand thumb rule. As the rod moves, the flux through the loop increases and current is induced in clockwise direction to opposes the change in flux (Lenz's Law)

ID: 2309662 • Letter: T

Question

The figure below shows a conducting oar moving along conducting rails in the presence of a constant magnetic field coming out of the oage Which (one) of the following statements is false? A The magnitude of the flux through the circuit Is increasing. B The force on the moving bar due to the magnetic field point in its direction of motion. (C) If the velocity of the bar Is constant power must be supplied by an external force which is entirely consumed in the resistance of the circuit. The Induced current Is clockwise.

Explanation / Answer

Statement B is incorrect.

The force on the moving bar due to the magnetic field point in the direction OPPOSITE of motion.
The direction can be seen by F = i (dl x B) (right hand thumb rule.

As the rod moves, the flux through the loop increases and current is induced in clockwise direction to opposes the change in flux (Lenz's Law)

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The figure below shows a conducting loop consisting of half-circle of radius r a

The figure below shows a conducting rod sliding along a pair of conducting rails

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The figure below shows a conducting oar moving along conducting rails in the pre

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