Types of Strain Gauges Quiz

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What does a photoconductive transducer convert to change in resistance of semiconductor material?

Current

Voltage

Light (correct)

Temperature

What do transducers convert?

Non-electrical quantity to electrical quantity (correct)

Light to sound

Mechanical energy to electrical energy

Electrical energy to mechanical energy

What type of transducer converts electrical quantity to a non-electrical quantity?

Photoelectric transducer

Resistive transducer (correct)

Inductive transducer

Capacitive transducer

What is the resistive element provided with in a potentiometer?

Wiper Signup and view all the answers

What does a strain gauge convert mechanical elongation and compression into?

Resistance change Signup and view all the answers

What formula is used to express the resistance of a metal conductor?

$R = \rho L / A$ Signup and view all the answers

What type of external power source is used for transducers that are not self-generating?

DC power supply Signup and view all the answers

What type of devices convert the physical quantity to be measured into mechanical signals in some transducers?

Primary transducers Signup and view all the answers

In capacitive transduction transducers, the measurand is converted into a change in which parameter?

Capacitance Signup and view all the answers

What is the purpose of the dielectric in a typical capacitor used in capacitive transduction?

To help the parallel plates maintain their stored electrical charges Signup and view all the answers

What are electrical devices called that convert mechanical signals into corresponding electrical signals?

Secondary transducers Signup and view all the answers

What do transducers produce as output signals in response to the quantity to be measured?

Variation in resistance, capacitance, inductance, or other electrical parameters Signup and view all the answers

What type of strain gauge consists of a wire stretched between two points in an insulating medium?

Unbonded Signup and view all the answers

Which material is commonly used for the wire in Unbonded strain gauges?

Copper Signup and view all the answers

What is the primary function of Wire covering with thin material in Bonded strain gauges?

To prevent mechanical damage Signup and view all the answers

Which type of strain gauge is used when a high gauge factor is desired?

Semiconductor gauge Signup and view all the answers

What is the main characteristic of Thermistors used as strain gauges?

Negative temperature coefficient to resistivity Signup and view all the answers

In a Thermocouple, what is the purpose of joining a pair of dissimilar metals at one end?

To generate a voltage proportional to temperature difference Signup and view all the answers

What is the main purpose of an inductive transducer?

Convert physical motion into a change in inductance Signup and view all the answers

Which type of transducer uses the basic generator principle to induce a voltage?

Self generating inductive transducers Signup and view all the answers

What type of material is typically used in resistance thermometers for their wires?

Platinum Signup and view all the answers

In what type of environment would you use a probe type sensor?

Immersion in a medium whose temperature needs to be measured or controlled Signup and view all the answers

What is the main function of a sensor system?

Acquire information from the real world Signup and view all the answers

What principle do variable-inductance transducers work on?

Variation in self inductance and mutual inductance Signup and view all the answers

What is the relationship between the output voltage V0 and the input voltage Vs in a potentiometer?

$\frac{V_{0}}{Vs} = \frac{R_{23}}{R_{13}}$ Signup and view all the answers

In a strain gauge element, what does the fractional change in resistance (ΔR/R) depend on?

Strain applied to the material Signup and view all the answers

How is the load voltage VL related to the output voltage V0 in the presence of a load resistance RL in a system?

Directly proportional if RL is infinite Signup and view all the answers

What is the function of a capacitive displacement sensor in terms of resolution and accuracy?

Enhances resolution and accuracy Signup and view all the answers

How is strain defined in relation to a flexible element with electrical resistance strain gauges?

Ratio of change in length to original length Signup and view all the answers

What causes a resistance change in electrical resistance strain gauges mounted on a flexible element?

Deformation or displacement Signup and view all the answers