1.

Two moving coil meters,M1 and M2 have the following particulars:R1 =10 Ω, N1 = 30,A1 =3.6 × 10−3 m2, B1= 0.25 TR2 =14 Ω, N2 = 42,A2 =1.8 × 10−3 m2, B2= 0.50 T(The spring constantsare identical for the two meters).Determine the ratio of(a) current sensitivity and (b) voltage sensitivity of M2and M1.

Answer»

Two moving coil meters,
M1 and M2 have the following particulars:


R1 =
10 Ω, N1 = 30,


A1 =
3.6 × 10−3 m2, B1
= 0.25 T


R2 =
14 Ω, N2 = 42,


A2 =
1.8 × 10−3 m2, B2
= 0.50 T


(The spring constants
are identical for the two meters).


Determine the ratio of
(a) current sensitivity and (b) voltage sensitivity of M2
and M1.


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