These two questions are similar. I don\'t know how to justify the direction. How

Question

These two questions are similar. I don't know how to justify the direction. How to consider this question? If there is a right hand rule, could you plz teach me right hand rule? I have exam tomorrow. I am a little worried.

Clicker Is there current in the falling bar and if there is which direction is it travelling? * A) No B) Yes, right C) Yes, left D) Yes, Up -E) This is the wrong answer Answer C Clicker . So current is travelling to the right. Is there a magnetic force on the bar? and if there is which direction is it travelling? . A) No B) Yes, right .C) Yes, left . D) Yes, Up F LIxB (Force on a wire in magnetic field) Answer D E) Yes, Down

Explanation / Answer

1) Yes, left

Because when the bar is falling down the flux through the loop is increasing so effort of induced current will be to decrease this so field due to induced current will be into the plane so current in the bar will be left.

2) since there is change in flux so according to Lenz's law force will be in opposite direction so upward.

Current is leftward.

We place our forefinger in the direction of magnetic field and thumb in the direction of current so palm faces the direction of force.

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