In the horizontal plane lies a straight conductor PQ of length 0.40m making an angle of 30∘ north of west. Point P is the eastern end of the conductor. The conductor is moved with speed 2.0ms−1 toward the north-east (along a line 45∘ east of north) in a uniform vertical magnetic field of 0.25T directed upward. Which end of the conductor becomes positively charged?
(a) End Q
(b) End P
(c) Neither end (induced emf is zero)
(d) Positive charge alternates between P and Q