KOE034: Sensors and Instruments

Sensor is a type of transducer.

• True

• False

A semiconductor can act as ___________________

• Insulator

• Semi conductor

• Pure conductor

• All of the mentioned

Which of the following is not a conductive paste?

• Copper

• Carbon particles

• Silver particles

• None of the mentioned

Every hot body emits IR radiation.

• True

• False

Energy of emitted radiation from a body increases with ______________

• Increase in temperature

• Decrease in temperature

• No relation with temperature

• Net energy cannot be changed

Which of the following is correct for proximity sensors?

• Inductive type

• Capacitive type

• Ultrasonic wave type

• All of the mentioned

Following is (are) true for Hall Effect sensors.

• They can operate as switches of high frequency

• Potential develops in the current carrying conductor

• Magnetic lines of forces are at 90^o to the current carrying conductor

• All of the above

Following acts as detector in Optical sensor

• Light emitting diode

• Photo diode

• Transistor

• All of the above

Inductive proximity sensors can be effective only when the objects are of _____ materials.

• Ferro magnetic

• non metals

• plastics

• All of the above

Following type of sensors are used to generate information in object grasping and obstacle avoidance.

• Hall Effect sensor

• Proximity sensor

• Light sensor

• Optical sensors