A wire of mass \(m\) can slide without friction on two parallel rails with a capacitor as shown.....

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A wire of mass \(m\) can slide without friction on two parallel rails with a capacitor as shown. A time dependent force \(F=k t\) is applied perpendicular to the \(\operatorname{rod} P Q\). A magnetic field \(B\) exist perpendicular to the plane of rails. Which of the following represents variation of current with time?
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