A conducting square frame of side 'a' and a long straight wire carrying current I are located in the same plane as shown n the figure. The frame moves to the right with constant velocity 'v'. The emf induced in the frame will be proportional to

$1 over straight x squared$
$fraction numerator 1 over denominator left parenthesis 2 straight x minus straight a right parenthesis squared end fraction$
$fraction numerator 1 over denominator left parenthesis 2 straight x plus straight a right parenthesis squared end fraction$
$fraction numerator 1 over denominator left parenthesis 2 straight x plus straight a right parenthesis squared end fraction$

fraction numerator 1 over denominator left parenthesis 2 straight x plus straight a right parenthesis squared end fraction

Potential difference across PQ is

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Electromagnetic Induction

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