Explain why the resistance of an ammeter is usually made small but that of a voltmeter is made large.

Why should the reistance of an ammeter be as low as possible whereas that of voltmeter be as high a possible ?

Why is the base region of transistor usually made thin?

Statement I: Out of galvanometer ,ammeter and voltmeter , resistance of ammeter is lowest and resistance of voltmeter is highest. Statement II: AN ammeter is connected in series and a voltmeter is connected in parallel, in a circuit.

Explain why the resistance of a semiconductor decreases with increase in temperature.

Due to a mistake in the designing an ammeter is joined is parallel to a resistance of a circuit amd a voltmeter in series with it.What will be the consequences?

A battery of emf 1.4V and interna! resistance 2Omega is connected to a resistor of 100Omega resistance through an ammeter. The resistance of ammeter is 4/3Omega a voltmeter has also been connected to find the potential difference across the resistor. The ammeter reads 0.02 A. What is the resistance of voltmeter.

A battery of emf 1.4V and interna! resistance 2Omega is connected to a resistor of 100Omega resistance through an ammeter. The resistance of ammeter is 4/3Omega a voltmeter has also been connected to find the potential difference across the resistor. The voltmeter reads 1.10V. What is the error in the reading ?

Explain why the concentraction of the sulphide ore is usually carried out by froth-floatation.

why the walls of dams at the base are made thicker?