When a current of 5mA is passed through a galvanometer having a coil of resistance `15Omega`, it shows full sacle deflection. The value of the resistance to be put in series with the galvanometer to convert it into a voltmeter of range `0-10V` is:

Options

A. `1.985 xx 10^(3) Omega`
B. `2.045 xx 10^(3) Omega`
C. `2.535 xx 10^(3) Omega`
D. `4.005 xx 10^(3) Omega`

Answer

a

Explanation

`i_(g) = 5mA, G = 15 Omega`
`V = (G + R) i_(g)`
` 10 = (15 + R) 5 xx 10^(-3)`
` 2 xx 10^(3) = 15 + R`
`R = 1985 Omega`
Hence option (a ) is correct.