IMA

Basically a potentiometer is a device for

• Comparing two voltages

• Measuring a current

• Comparing two currents

• Measuring a voltage

In order to achieve high accuracy, the slide wire of a potentiometer should be

• As long as possible

• As short as possible

• Neither too small not too large

• Very thick

A potentiometer can not be used to

• Measure emf of a cell

• Compare emf of 2 cells

• Measure unknown temperature

• Measure the internal resistance of a cell

Standardization of potentiometer is done in order that they become,

• Accurate

• Precise

• Accurate and direct reading

• Accurate and precise

A potentiometer is basically a

• Deflection type instrument

• Null type instrument

• A digital type instrument

• All of the above

The transfer instrument which is used for standardization of a polar type ac potentiometer is

• Electrostatic instrument

• Dynamometer instrument

• Moving coil instrument

• Thermal instrument

The calibration of a voltameter can be carried out by using

• An ammeter

• Function generator

• Frequency meter

• Potentiometer

Which of the following is not the characteristic of ion selective electrode.

• Fragile

• Easy to use

• Available in different shapes and sizes

• Insensitive to ions

Which of the following is not the characteristic of ion selective electrodes.

• Simple to use

• Inexpensive

• Narrow concentration range

• Operates in wide range of temperature

Ion selective electrode are unaffected by colour or turbidity of the solution.

• True

• False