JAMB - Physics (2004 - No. 6)
A moving coil galvanometer has a full-scale deflection of 3A equivalent to 30o deflection. The sensitivity of the instrument is
33.0
0.1
90.0
10.0
Giải thích
The sensitivity of a measuring instrument is given by deflection per unit current: and given that deflection = 30º; and current (I) = 3A: then the sensitivity of the meter = 30/3 = 10.0