Capacitance can be varied in ____
1.10 ways
2.6 ways
3.2 ways
4.4 ways
Capacitive pressure transducer uses distance of separation for sensing the capacitance.
1.True
2.False
3.all of the above
4.None of the mentioned
Commonly used photoemissive material is _______
1. gold
2.opium
3. tellurium
4.cesium-antimony
Diaphragms in a pressure sensor are of _____
1.2 types
2. 5 types
3.10 types
4. 20 types
If two different metals are joined forming a closed circuit an electric current flows.
1. True
2.False
3.all of the above
4.None of the mentioned
In general how many pressure sensitive devices are there?
1.6
2.20
3. 10
4.4
In kitchen applications a piezoelectric crystal is used for _____
1. skimming milk
2. lighting a gas stove
3. grinding
4. mixing
Output of electrical transducer is ____
1. inversely proportional to displacement
2.proportional to square of displacement
3.proportional to displacement
4.constant
Photoelectric transducers consist of _______
1. 1 transducer
2.3 transducers
3.5 transducers
4.10 transducers
Reluctance of a coil is given by which of the following relation?
1. S = 1â„A
2.S = 1â„μ
3. S = aâ„μA
4. S = 1â„μA
Self-inductance depends on ______
1.permeability
2.permittivity
3.plank’s constant
4.rydberg constant
What is the relation between capacitance and input impedance?
1. directly proportional
2.constant
3.proportional to square
4.inversely proportional
A capacitive transducer works on the principle of ______
1.inductance
2.capacitance
3. resistance
4.reluctance
A piezoelectric transducer has a _____
1.very high sensitivity
2.low sensitivity
3. high sensitivity
4.zero sensitivity
A piezoelectric transducer is used as an ignition source for a cigarette.
1. True
2. False
3.all of the above
4.None of the mentioned
A quartz crystal is _______
1.a chemical transducer
2.a photoelectric transducer
3.not a self-generating transducer
4. a self-generating transducer
An inductive transducer measures the variation in _____
1.reluctance
2.resistance
3.capacitance
4.self-inductance
Based on self-inductance of a coil, how many types of inductive transducers are available?
1.5
2.10
3.4
4.20
Bellows have 5 to 20 convolutions.
1. True
2.False
3.all of the above
4.None of the mentioned
Bourdon tubes are ____
1.very highly sensitive to shock
2.not sensitive to shock
3.less sensitive to shock
4.more sensitive to shock
Capacitive transducer displays ____
1. linear behaviour
2. non-linear behaviour
3.exponential behaviour
4.tangential behaviour
Capsule type of pressure sensor consists of ______
1.6 dissimilar diaphragms
2.4 identical diaphragms
3. 2 identical diaphragms
4.8 dissimilar diaphragms
Chromel-constantan thermopile consists of 25 thermocouples.
1.True
2.False
3.all of the above
4.None of the mentioned
Commonly used thermoelectric transducer is _____
1. thermometer
2.thermocouple
3. linear variable differential transducer
4.loud speaker
Composite capacitance consists of _________
1. one dielectric medium
2.more than one dielectric medium
3.five dielectric media
4. ten dielectric media
For accurate temperature measurement in a thermocouple the _____
1.cold compensation is needed
2.hot compensation is needed
3. no compensation is needed
4. hot and cold compensations are needed
Frequency response of capacitive transducers is ____
1.high
2.medium
3.low
4.zero
In an eddy current transducer output depends on the variation in the eddy current.
1.True
2.False
3.all of the above
4.None of the mentioned
Inductive transducer is used for the measurement of physical quantities.
1.True
2.False
3.all of the above
4.None of the mentioned
Microphone converts light into heat.
1. True
2. False
3.all of the above
4.None of the mentioned
Most suitable material for a thermocouple is ______
1.brass
2.gold
3.platinum
4.silver
Mutual inductance depends on ______
1.self-inductance
2.self-inductance and coefficient of coupling
3.coefficient of coupling
4.permittivity of air
Optical radiations involve ______
1.optoelectric devices
2.biological devices
3.mechanical devices
4. chemical devices
Photoconductive transducers produce output ______
1.due to change in inductance
2.due to change in light
3. due to change in resistance
4.due to change in temperature
Piezoelectric crystals produce ________
1.no voltage
2.low voltage
3. high voltage
4.very high voltage
Piezoelectric crystals _______
1. float on water
2.dissolve in water
3.are not soluble in water
4. absorb water
Piezoelectric transducer is used for measuring ________
1.non-electrical quantities
2.electrical quantities
3.chemical quantities
4.any quantity
Pressure is the _____
1. force per unit area
2.mass per unit area
3.force per unit volume
4. mass per unit volume
Pressure measurement devices make use of _____
1. non-elastic member
2.elastic member
3. bendable member
4.non-bendable member
Self-inductance of an inductor is given by _____
1.L = Nâ„S
2. L = 1â„S
3. L = N2â„S
4. L = N2
Sensitivity in a capsule is increased ______
1.through parallel connection of capsules
2.through series connection of capsules
3.through series and parallel connection of capsules
4.by not connecting them at all
Temperature is the only consideration while selecting a diaphragm.
1.True
2.False
3.all of the above
4.None of the mentioned
The algebraic sum of e.m.f.s in a circuit containing thermocouples is ______
1. infinite
2.hundred
3. zero
4.ten
Thermocouple must provide _____
1.small thermo e.m.f
2.sufficient thermo e.m.f
3.no thermo e.m.f
4.infinite thermo e.m.f
Thermoelectric transducer is a _____
1.temperature transducer
2.pressure transducer
3.inductive transducer
4.capacitive transducer
What is a thermopile?
1. single thermocouple
2.series-parallel connection of thermocouples
3.parallel connection of thermocouples
4.series of thermocouples
What is the relation between capacitance and output impedance?
1.proportional to square
2.constant
3.directly proportional
4.inversely proportional
What is the relation between the self-inductance and the reluctance of a coil?
1.directly proportional
2.inversely proportional
3. no relation
4.constant
When a compressive force is applied to a quartz crystal then ________
1.positive charges are induced
2.negative charges are induced
3. no charge is induced
4.both positive and negative charges are induced
Which of the following should satisfy for measuring higher temperatures using a thermocouple?
1. no wire is required
2.wire must be small
3.wire must be thin
4. wire must be heavy