An ammeter and a milliammeter are converted from the same galvanometer. Out of the two, which current measuring instrument has higher resistance?  

The force $\overrightarrow{F}$ experienced by a particle of charge $e$  moving with velocity $\overrightarrow{v}$ in a magnetic field $\overrightarrow{B}$ is given by $\overrightarrow{F}=e(\overrightarrow{v}\times \overrightarrow{B})$. Of these, name the pair of vectors which are always at right angle to each other.

What is the nature of magnetic field in a moving coil galvanometer ?