A rectangular conductor `SPQR` is placed in a uniform magnetic field perpendicular to the plane and extending from `x=0` to `x=b` as shown below. The arm `PQ` of length `l` is moving from `x=0` to `x=2b` with constant speed `v`. Find the flux and emf induced in the conductor.
Options:
(a) `Blx,-Blv`, when `0 le x < b`
(b) `2Bl,-2Bl`
(c) `Blb,0, when b le x < 2b`
(d) Both ( a) and ( c)