using the figure in the first picture, can someone explain the answer to ii? why

Question

using the figure in the first picture, can someone explain the answer to ii? why is the direction of the current in the conducting bar up?

uniform 6. A pair of parallel conducting rails that are 12 cm apart lies at right angles to a magnetic field of 0.8 T directed into the page as shown below. A 15 resistor is connected across the rails. A conducting bar is moved to the right at 2 m/s across the rails. B-0.8 T, into page x 12 cm moving conducting bar i. What is the current flowing in the resistor? a. 0.0052 A 0.0128 A c. 0.0542 A d. 0.1682 A e. none of the above

Explanation / Answer

As the rail is moving to right and magnetic field is constant so magnetic flux(=magnetic field *area) increases.

Now according to Lenz law, induced current will be flowing in a direction such that it decrease flux. As the magnetic field present is acting into the page so magnetic field by induced current must be acting out of plane.

Using right hand thumb rule, current must be counterclockwise so current in bar must be up

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