question_answer

A moving coil galvanometer has 150 equal divisions. Its current sensitivity is 10 divisions per milliampere and voltage sensitivity is 2 divisions per millivolt. In order that each division reads 1 V, the resistance in Ohm's needed to be connected in series with the coil will be     AIEEE  Solved  Paper-2005

A) \[{{10}^{3}}\] 

B)                                        \[{{10}^{5}}\]                    

C)        99995                   

D)        9995

Correct Answer: D

Solution :

Full scale deflection current Full scale deflection voltage Galvanometer resistance, Required full scale deflection voltage, Let resistance to be connected in series be R.           \[V={{l}_{g}}(R+G)\]