S L Arora Solutions for Chapter: Magnetic Effect of Current, Exercise 2: VERY SHORT ANSWER CONCEPTUAL PROBLEMS

Which one has the lowest and which one has the highest resistance : ammeter, a voltmeter or a galvanometer ?

A galvanometer is first converted into a voltmeter of range $0-3 \mathrm{V}$ and then into a voltmeter of range $0-6 \mathrm{V}$. In which case the resistance would be higher one? 

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

A voltmeter and a millivoltmeter are converted from the same galvanometer. Out of the two, which potential difference measuring device has a higher resistance ?

One voltmeter has a resistance of $1000 \mathrm{\Omega }$ and another voltmeter has a resistance of $4000 \mathrm{\Omega }$. Which one of the two will you prefer to measure a potential · difference across a resistance of $500 \mathrm{\Omega }$ ?

When an ammeter is put in a circuit, does it read slightly less or more than the actual current in the circuit ? Give reason.

When a voltmeter is put across a part of the circuit, does it read slightly less or more than the actual voltage drop across that part ? Give reason.

Which one of the two, an ammeter or a milliammeter, has a higher resistance and why ?