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6. Electromagnetic induction — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics6. Electromagnetic induction1 Mark
MCQ
The figure shows certain wire segments joined together to form a coplanar loop. The loop is placed in a perpendicular magnetic field in the direction going into the plane of the figure. The magnitude of the field increases with time. $I_1$ and $I_2$ are the currents in the segments $ab$ and $cd$. Then,
  • A
    $I_1>I_2$
  • B
    $I_1 < I_2$
  • C
    $I_1$ is in the direction ba and $I_2$ is in the direction $ed$
  • ✓
    $I_1$ is in the direction ab and $I_2$ is in the direction $de$
✓

Answer

Correct option: D.
$I_1$ is in the direction ab and $I_2$ is in the direction $de$
d
According to Lenz's law, current will be in anticlockwise sense as magnetic field is increasing into the plane of paper.

The induced magnetic field has to be out of the plane of the paper.

Hence, the current in the segment ab will be from $a$ to $b$ and current in the segment cd will be $d$ to $c$.

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