question_answer 9)

Two moving coil meters, and have the following particulars:                 (The spring constants are identical for the twometers).                 Determine the ratio of (a) current sensitivityand (b) voltage sensitivity of and .  

Answer:

Using Current sensitivity                 For , Current Sensitivity                                                    ?? (i)                 For , Current sensitivity                                                       ?.. (ii)                 Dividing (ii) by (i)                                                              Using Voltage sensitivity                 For , Voltage sensitivity                                      ?. (iii)                 For , Voltage sensitivity                                       ?.. (iv)                 Dividing (iv) by (iii), we get