A metal rod of resistance 20 Ω is fixed along a diameter of a conducting ring of radius 0.1 m and lies in an x-y plane. There is a magnetic field B→=(50 T)k^. The ring rotates with an angular velocity ω=20 rad/s about its axis. An external resistance of 10 Ω is connected acrossthe centre of the ring and rim. The current through external resistance is