BEEE0050: Sensors & Transducers- Quiz-1

Which of the following best defines a transducer?

• A device that only senses mechanical energy
• A device that converts one form of energy into another
• A device that stores energy
• A device that amplifies signals

The resolution of a potentiometric sensor primarily depends on:

• Length of the resistive element
• Material used
• Wiper contact area
• Number of turns

The sensitivity of a potentiometric sensor is expressed as:

• Change in resistance per unit displacement
• Change in voltage per unit displacement
• Change in current per unit displacement
• Change in power per unit displacement

The gauge factor of a strain gauge is defined as the ratio of:

• Fractional change in resistance to applied load
• Fractional change in resistance to fractional change in length
• Resistance to strain
• Stress to strain

Which material is commonly used in strain gauge fabrication?

• Nichrome
• Copper
• Silicon
• Graphite

What is the main purpose of adhesive in a strain gauge?

• To reduce resistance
• To increase resistance

• To bond the gauge to the specimen
• To prevent temperature variation

A strain gauge rosette is used to:

• Increase sensitivity
• Measure strain in multiple directions
• Reduce noise
• Compensate temperature

Which type of inductive sensor operates on reluctance change principle?

• Ferromagnetic plunger type
• Mutual inductance type
• Transformer action type
• Magnetostrictive type

In a mutual inductance change type sensor, the output depends on:

• Self-inductance
• Variation in coupling between coils
• Magnetic hysteresis
• Core material expansion

Magnetostrictive sensors work based on:

• Change in resistance due to stress
• Change in magnetic permeability due to strain
• Change in capacitance due to displacement
• Change in reluctance