Q. 58 The dc current flowing in a circuit is measured by two ammeters, one PMMC
and another electrodynamometer type, connected in series. The PMMC meter
contains 100 turns in the coil, the flux density in the air gap is 
, and
the area of the coil is
The electrodynamometer ammeter has a change in
mutual inductance with respect to deflection of 0.5 mH/deg. The spring constants
of both the meters are equal. The value of current, at which the deflections of the
two meters are same, is ______
Answer:(3.2 A)
Explanation:
