Question

Direction: The following item consists of two statements, one labelled as ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer using the codes given below:

Statement (I): An analog system has at its output stage a PMMC indicating instrument, while a digital meter output stage has an LCD/LED display device.

Statement (II):  Since the analog system is continuous in time, display device can respond to it if the signal frequency is low, while digital system being a discrete one, it does not required change and can be latched at the value of measurement.

1. Both Statement I and Statement II are individually true and Statement II is the correct explanation of Statement I
2. Both Statement I and Statement II are individually true but Statement II is not the correct explanation of Statement I
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Answer 1

Correct Answer - Option 1 : Both Statement I and Statement II are individually true and Statement II is the correct explanation of Statement I

Concept:

Analog instruments:

• In these instruments, the signals vary in a continuous fashion and can take on an infinite number of values in a given range.
• Fuel gauge, ammeter, and voltmeters, wristwatch, speedometer fall in this category.

 

Digital instruments:

• Signals that vary in discrete steps and that take a finite number of different values in a given range are digital signals and the corresponding instruments are of digital type.
• Digital instruments have some advantages over analog meters, in that they have high accuracy and high speed of operation. A digital multi-meter is an example of a digital instrument.
• These are used as standard instruments for calibrating deflection instruments.

 

Application:

As the analog system is continuous in time, display device can respond to it if the signal frequency is low.

As digital system being a discrete one, it does not required change and can be latched at the value of measurement.

Therefore, an analog system has at its output stage a PMMC indicating instrument, while a digital meter output stage has an LCD/LED display device.