Explore topic-wise MCQs in Graduate Aptitude Test (GATE).

A psychometric chart is used to determine

The output Y of a 2-bit comparator is logic 1 whenever the 2-bit input A is greater than the 2-hit input B. The number of combinations for which the output is logic 1, is:

The average power delivered to an impedance (4—j3) Ω by a current 5cos (100πt÷100) A is

The resistance of LDR ________________ when exposed to radiant energy

Photo multiplier consists of

Fiber optic sensor can be used to sense _________

____________ fiber is used in interferometric instruments.

In a graded index fiber, the total reflected light takes a ___________

The capacitance microphone is used for the detection of

Silver chloride electrode is used as a reference electrode due to its

 pH value of venous blood is

_____________ is the example of photo emissive cell

Most commonly used indicator electrode is

Test electrode is also known as

S1: In multimode fiber optics, intensity modulating schemes can be employed.
S2: Schemes using polarizing techniques need birefringent fiber.

Photo conductive cell consists of a thin film of

In foil strain gauge the thickness of foil varies from

The change in resistance of a metal wire owing to strain is due to
S1: Change in dimension of wire expressed by factor (1-2µ)
S2: Change in resistance ??

Pressure transducer for measuring blood pressure is

Venturi is associated with

The application of LVDT is

The principle of operation of variable resistance transducer is

The transducers which requires an external power and their output is a measure of some variation such as resistance, inductance, capacitance etc., are called as

Pick the correct statement regarding functions of a transducer
S1: Sense the magnitude, change in & / or frequency of same measurand
S2: To provide electrical output that furnishes accurate, quantitative data about the measurand

Capacitive transducers are normally employed for___________ measurements

In a LVDT, the two secondary voltages

S1: Transducer is a device which converts physical into electrical quantity
S2: Transducer is also called as sensor.

Which of the following can be measured with the help of piezo electric crystal?

LVDT is an/a ___________ transducer

The principle of operation of LVDT is based on the variation of

The size of air cored transducers in comparison to the iron core parts is

LVDT windings are wound on

The draw backs of strain gauges are
S1: Low fatigue life
S2: They are expensive, brittle and sensitive to temperature
S3: Poor linearity

Piezo electric crystal can produce an emf

Piezo – electric transducers work when we apply _____________ to it.

Piezo-electric transducers are

Which of the following are piezo electric substances?
1. Barium titanate
2. Lead titanate
3. Lead Zirconate
4. Cadmium and sulphate

Quartz and Rochelle salt belongs to ___________ of piezo-electric materials

Certain type of materials generates an electrostatic charge or voltage when mechanical force is applied across them. Such materials are called

Bonded wire strain gauges are

In wire wound strain gauges, the change in resistance is due to

The sensitivity factor of strain gauge is normally of the order of

Resolution of a transducer depends on

A strain gauge is a passive transducer and is employed for converting

An inverse transducer is a device which converts

Strain gauge, LVDT and thermocouple are examples of

Which of the following is a digital transducer?

A transducer that converts measurand into the form of pulse is called

The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer.

 Self generating type transducers are ___________ transducers.