1.

Two moving coil galvanometers 1 and 2 are with identical field magnets and suspension torque constants, but with coil of different number of turns N_(1) and N_(2), area per turn A_(1) and A_(2), and resistance R_(1) and R_(2). When they are connected in series in the same circuit, they show deflections theta_(1) and theta_(2). then theta_(1)//theta_(2) is

Answer»

`A_(1) N_(1)// A_(2) N_(2)`
`A_(1) N_(2)// A_(2) N_(1)`
`A_(1) R_(2) N_(1)// A_(2) R_(2) N_(2)`
`A_(1)R_(1) N_(1)// A_(2)R_(2) N_(2)`

SOLUTION :`I = (k)/(NBA) 6.` Given that `I_(1) = I_(2)`
`:. (K theta_(1))/(N_(1)BA_(1)) = (K theta_(2))/(N_(2)BA_(2))`
So `(theta_(1))/(theta_(2)) = (A_(1)N_(1))/(A_(2) N_(2))`


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