Should the resistance of an ammeter be low or high ? Give reason.

What is the resistance of an ammeter ?

The resistance of an ideal ammeter is

The resistance of an ideal ammeter is

The resistance of ammeter is R_(0)

Why should the resistance of: (a) an ammeter by very small? (b) a voltmeter be very large?

Why should the resistance of an ideal voltmeter be infinite and of ideal ammeter be zero?

A voltmeter and an ammeter are joined, in series to an ideal cell, giving reading V and A respectively. If a resistance equal to the resistance of the ammeter is now joined in parallel to the ammeter then :

A fuse should be made of a material of low melting point. Give reason