SOLUTION

• Integrating instruments are those which measure the total amount of the electrical quantity (e.g. energy) supplied over a period of time.
• In such instruments, there are sets of dials or gears which register the total quantity of electricity or the total amount of electrical energy supplied to a circuit in a given period.
• The Household energy meter is an integrating instrument.
• The Ampere-hour meter is another example of integrating instruments.