Which one will you prefer to measure em.f of a cell, a potentiometer or a voltmeter?

Why do we prefer a potentiometer to measure e.m.f. of a cell rather than a voltmeter?

Explain how will you compare the e.m.f’s of two cells by a potentiometer.

Which one will you prefer, a common base or a common emitter amplifier?

What do you mean by emf of a cell?

Explain the principle of a potentiometer. How will you compare the e.m.f. of two primary cells by using potentiometer? Explain with proper circuit diagram.

Define e.m.f of a cell. How can you compare the e.m.f of the cells using potentiometer.

The variation of potential difference V with length l in the case of two potentiometers, P and Q is as shown in the figure. Which of these two will you prefer for comparing the emf's of the two primary cells?

Name the device used for measuring the e.m.f. of a cell.

To measure e.m.f of a cell, which instrument will you use a high resisdance voltmeter or a potentiometer and why?