The coil of a galvanometer consists of 100 turns and effective area of 1 square cm. The restoring couple is 10– 8 N-m rad. The magnetic field between the pole pieces is 5T. The current sensitivity of this galvanometer will be
(a) 5 x 104 rad/μ amp
(b) 5 x 10– 6 per amp
(c) 2 x 10– 7 per amp
(d) 5 rad./μ amp
