Combination of Cell

Should the resistance of a voltmeter be low or high? Give reason.

Draw a schematic diagrams of an electric circuit comprising of $3$ cells and an electric bulb, ammeter, plug-key in the ON mode and another with same components but with two bulbs in parallel and a voltmeter across the combination.
 

What is the overall emf for the series combination of cells having same individual emf when the positive terminal of one cell is connected to the negative terminal of the succeeding cell?

A science teacher asked a student to measure potential difference across the ends of a dry cell. The device needs to be used by the student is :

In an electric circuit, the voltmeter is used :

What is mixed combination of cells?

Explain the difference between the following-

ammeter and voltmeter

Voltmeter is connected in series in the circuit.

A voltmeter