The figure shows a plane made of a conductor located in a magnetic field, along inwards, normal to the plane of the figure. $P$ and $Q$ are two coils. The magnetic field starts diminishing. Select the incorrect statement.

 

A conducting wire frame is placed in a magnetic field which is directed into the paper. The magnetic field is increasing at a constant rate. The directions of induced current in wires $AB$ and $CD$ are :-

In an $\mathrm{LC}$ circuit, the capacitor has maximum charge $q_0$. The value of ${\overline{)\frac{\mathrm{di}}{\mathrm{dt}}}}_{\max }$ is

$PQ$ is an infinite current carrying conductor. $AB$ and $CD$ are smooth conducting rods on which a conductor $EF$ moves with constant velocity $V$ as shown. The force needed to maintain constant speed of $EF$ is