Activity # 3

What is a transducer?

• A device that converts energy from one form to another
• A device that measures temperature
• A type of resistor
• A type of capacitor

Answer explanation

Transducers convert energy from one form to another.

What does LVDT stand for?

• Linear Variable Digital Transformer
• Low Voltage Displacement Transducer
• Linear Voltage Differential Transducer
• Linear Variable Differential Transformer

Answer explanation

LVDT stands for Linear Variable Differential Transformer

What physical quantity does an LVDT typically measure?

• Temperature
• Displacement
• Pressure
• Voltage

Answer explanation

LVDTs measure linear displacement with high accuracy.

In an LVDT what is the principle of operation based on?

• Capacitive sensing
• Inductive coupling
• Piezoelectric effect
• Resistive strain

Answer explanation

LVDTs operate based on inductive coupling.

Name one application where LVDTs are commonly used.

• Voltage measurement in power lines
• Pressure measurement in hydraulic systems
• Displacement measurement in automotive suspensions
• Current measurement in electrical circuits

Answer explanation

LVDTs are used in automotive suspensions to measure displacement.

What physical quantity does a strain gauge measure?

• Temperature
• Strain
• Pressure
• Voltage

Answer explanation

Strain gauges measure strain

What is the principle of operation of a strain gauge?

• Capacitive sensing
• Inductive coupling
• Piezoelectric effect
• Change in electrical resistance due to mechanical strain

Answer explanation

Strain gauges operate by changing electrical resistance with mechanical strain.

What is the gauge factor of a strain gauge?

• The ratio of change in resistance to change in length
• The ratio of change in resistance to change in temperature
• The ratio of change in resistance to applied strain
• The ratio of strain to applied force

Answer explanation

The gauge factor is the ratio of resistance change to applied strain.

What is the principle of operation of a DC Crompton’s potentiometer?

• Measures voltage by comparing with a standard reference
• Measures current through a series of resistors
• Measures displacement by inductive coupling
• Measures resistance using a balanced bridge circuit

Answer explanation

Crompton’s potentiometer measures voltage by comparing it with a standard reference voltage.

What is the process of standardization in a potentiometer?

• Calibrating the potentiometer against known standards
• Measuring temperature variation in the circuit
• Adjusting the resistance of the potentiometer
• Calculating the gauge factor of the potentiometer

Answer explanation

Standardization involves calibrating against a known standard for accurate measurements.