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Two moving coil meters, M(1) and M(2) ha...

Two moving coil meters, `M_(1)` and `M_(2)` have the following particulars:
`R_(1) = 10 Omega, N_(1) = 30`,
`A_(1) = 3.6 xx 10^(-3)m^(2), B_(1) = 0.25T`
`R_(2) = 14 Omega, N_(2) = 42`,
`A_(2) = 1.8 xx 10^(-3)m^(2), B_(2) = 0.50 T`
(The spring constants are identical for the two meters) Determine the ratio of (a) current sensitivity and (b) voltage sensitivity of `M_(2)` and `M_(1)`.

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