Question

instrum.. x May 20, าร Question 3 The coil of a moving coil galvanometer (used in strip chart recorder) has 40 000 turns and is suspended in a uniform magnetic field of 0.18T. The control constant is 0.CISN-m per radian. The coil is 60mm wide and 30mm high with a momeni of inertia of 0.005 kg-m The damping constant is 0.014 N-m per radian per second and the coulomb friction is 0.13 x10 N.m. Determine e current required in the coil to produce a deflection 45® and tne current required to overcome the coulomb friction. Also find out whether the instrument is over damped or underdamped. [20]

Answer 1

·oluk-n/nd/.Sec ' "J:0.00 D: , K:ㅇ.cl5 N)-m/S7a Damping anatio domping Constant cn Constan Tnertia Sporung Constant 20.005 Xo ol5 CS scanned with Cam Scanner