Cat Candidate Quiz
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Questions and Answers

What color is the cat in the image?

  • Light gray
  • Light brownish orange (correct)
  • Dark black
  • White

What object is the cat holding in the image?

  • A microphone stand
  • A microphone (correct)
  • A book
  • A glass of water

What does the Arabic text below the image say?

  • The candidate (correct)
  • The winner
  • The speaker
  • The presenter

What is the setting suggested by the background of the image?

<p>A meeting or formal setting (A)</p> Signup and view all the answers

In the image, which action is the cat seemingly performing?

<p>Giving a speech (A)</p> Signup and view all the answers

What is the main function of a sensor in robotic systems?

<p>To convert physical input into a usable output (A)</p> Signup and view all the answers

Which of the following is an example of a contact sensor?

<p>Switch (A)</p> Signup and view all the answers

What type of sensor would you use to measure temperature?

<p>Thermal sensor (B)</p> Signup and view all the answers

According to Ohm's Law, what does the equation V = IR represent?

<p>Resistance is voltage divided by the current (D)</p> Signup and view all the answers

What characterizes a limit switch?

<p>It indicates the presence or passage of a moving part (D)</p> Signup and view all the answers

What is the typical output state of a mechanical switch when it is closed?

<p>5 volts (C)</p> Signup and view all the answers

Which of the following sensors is used to detect light levels?

<p>Photo cell (A)</p> Signup and view all the answers

Which sensor would be best suited for measuring altitude?

<p>Altimeter (A)</p> Signup and view all the answers

What is the primary difference between limit switches and proximity switches?

<p>Limit switches require physical contact to operate while proximity switches do not. (B)</p> Signup and view all the answers

Which type of proximity switch operates based on variation in magnetic inductance?

<p>Inductive proximity switches (A)</p> Signup and view all the answers

Which of the following is NOT an actuator head type for limit switches?

<p>Pressure sensor (B)</p> Signup and view all the answers

What is the primary function of a capacitive proximity switch?

<p>Detecting the proximity of metallic and non-metallic objects (B)</p> Signup and view all the answers

What is one advantage of using limit switches over proximity switches?

<p>Limit switches come in a wider variety of sizes. (A)</p> Signup and view all the answers

How does the capacitance of a pair of plates change with the separation distance?

<p>Decreases with greater separation (A)</p> Signup and view all the answers

What principle do capacitive proximity switches operate on?

<p>Variation of capacitance (B)</p> Signup and view all the answers

In a capacitive proximity switch, what role does the non-metallic object play?

<p>It serves as a dielectric material affecting capacitance (C)</p> Signup and view all the answers

Which of the following statements about proximity switches is true?

<p>They detect objects without physical contact. (A)</p> Signup and view all the answers

What is the typical detection range for capacitive proximity switches?

<p>4 to 60 mm (B)</p> Signup and view all the answers

Which actuator type is associated with limit switches that can transmit external force in various ways?

<p>Roller lever actuator (D)</p> Signup and view all the answers

What primarily changes in an inductive proximity switch when a ferrous metal object approaches?

<p>The inductance of the coil changes (A)</p> Signup and view all the answers

What are the two most commonly used proximity switches in industrial applications?

<p>Inductive and capacitive switches (D)</p> Signup and view all the answers

What are the two components involved in the capacitance measurement of a capacitive proximity switch?

<p>Sensor and a non-metallic object (C)</p> Signup and view all the answers

What kind of materials can an inductive proximity switch detect?

<p>Ferrous metallic objects only (A)</p> Signup and view all the answers

Which of the following describes the activation mechanism of capacitive proximity switches?

<p>Voltage change due to capacitance variation (B)</p> Signup and view all the answers

What is the primary function of the emitter in reflective opto-sensors?

<p>To emit light (C)</p> Signup and view all the answers

Which factor can negatively impact the performance of photoelectric sensors?

<p>Increased ambient light (D)</p> Signup and view all the answers

What happens to the resistance of a light sensor when exposed to brighter light?

<p>It decreases (B)</p> Signup and view all the answers

What is a common application of photoelectric sensors in robotic systems?

<p>Object distance detection (C)</p> Signup and view all the answers

Which component in a potentiometer is primarily responsible for varying the voltage?

<p>The variable resistor (A)</p> Signup and view all the answers

What primarily distinguishes retro-reflective photoelectric switches from diffuse-reflective switches?

<p>Retro-reflective switches use a reflector, whereas diffuse-reflective switches do not. (B)</p> Signup and view all the answers

What type of operation does a 'Dark On' photoelectric switch perform?

<p>The switch is energized when the light beam is interrupted. (C)</p> Signup and view all the answers

In terms of detection distance, what is the typical range for photoelectric switches?

<p>From less than 10 cm up to 1500 cm. (A)</p> Signup and view all the answers

What is the function of the reflectors used in retro-reflective photoelectric switches?

<p>To reflect the incoming beam back to the receiver parallelly. (B)</p> Signup and view all the answers

Why is a simple mirror sometimes used as a reflector in retro-reflective switches?

<p>It can reflect the beam back to the receiver effectively. (B)</p> Signup and view all the answers

How does the detection mechanism of a diffuse-reflective photoelectric switch operate?

<p>It relies on direct reflection from the object's surface back to the receiver. (B)</p> Signup and view all the answers

What happens when an object is placed in the beam trajectory of a diffuse-reflective photoelectric switch?

<p>The beam is diffused in various directions, with some returning to the receiver. (C)</p> Signup and view all the answers

What is the primary characteristic of a photoelectric switch's 'Light On' operation?

<p>The switch is energized when the beam of light is detected by the receiver. (A)</p> Signup and view all the answers

What is a primary function of a photoelectric switch?

<p>To detect the presence of an object at long ranges (A)</p> Signup and view all the answers

Which type of photoelectric switch has separated emitter and receiver units?

<p>Through-beam switch (B)</p> Signup and view all the answers

What advantages does the through-beam photoelectric switch have compared to other types?

<p>It has a longer sensing distance (B)</p> Signup and view all the answers

In what scenario might a break-beam sensor be used?

<p>For triggering alarms when an object interrupts a light beam (C)</p> Signup and view all the answers

Which does NOT categorize photoelectric switches?

<p>Differential (A)</p> Signup and view all the answers

How do photoelectric switches detect objects?

<p>They rely on a beam of light being interrupted (A)</p> Signup and view all the answers

What type of photoelectric switch uses a reflective surface to return a light beam to the receiver?

<p>Retro-reflective sensor (C)</p> Signup and view all the answers

Which characteristic of photoelectric sensors supports their use in various environments?

<p>Their solid-state design with no moving parts (A)</p> Signup and view all the answers

Flashcards

Candidate

A person who is seeking or nominated for an election or position.

Formal Setting

A serious or official environment.

Political Speech

A speech given by a candidate during an election or campaign.

Campaign

An organized effort or process to elect or support a candidate for an office.

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Microphone

An electronic device used for amplifying sound.

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Sensor

A device that converts a physical input (like temperature or pressure) into a usable output signal. This signal is typically electrical.

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Contact Sensor

A sensor that detects the presence or absence of an object by direct physical contact.

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Distance Sensor

A sensor that measures the distance to an object without direct contact.

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Light Level Sensor

A sensor that measures the intensity of light.

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Strain Gauge

A sensor that measures the amount of deformation or stress in a material.

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Encoder

A sensor that measures the rotation or position of a shaft.

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Inclinometer

A sensor that measures the angle or inclination of a surface.

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Ohm's Law

A fundamental law in electronics that relates voltage (V), current (I), and resistance (R) in a circuit: V = IR.

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Limit Switch

A mechanical switch activated by direct contact with a physical object, like a lever or roller, to trigger an electrical circuit.

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Actuator Head

The part of a limit switch that receives the force from the object being sensed, converting it into an electrical signal.

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Push Plunger

A type of actuator head where a rod, plunger, or button is directly pushed to trigger the switch.

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Roller Plunger

A type of actuator head with a roller that moves against a surface to trigger the switch.

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Fork Type Actuator

A type of actuator head with a forked design, designed to sense objects with specific shapes or profiles.

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Proximity Switch

A non-contact sensor that detects the presence of an object without touching it. It uses various sensing principles, such as inductance, capacitance, or magnetic fields.

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Inductive Proximity Switch

A proximity switch that uses the principle of magnetic inductance to detect metallic objects. The inductance changes when an object is near the sensor.

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Capacitive Proximity Switch

A proximity switch that uses capacitance to detect both metallic and non-metallic objects. The capacitance changes when an object is near the sensor.

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Photoelectric switch

A solid-state sensor that detects objects at long distances by emitting and receiving light beams. It's often called a photocell.

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Through-beam photoelectric switch

A type of photoelectric switch where the emitter and receiver are separate units, positioned opposite each other. It detects objects when the light beam is interrupted.

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Retro-reflective photoelectric switch

A photoelectric switch where the emitter and receiver are in the same housing. The light beam is reflected back to the sensor by a reflector.

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Diffuse photoelectric switch

A photoelectric switch that detects objects by the scattering of emitted light. The sensor emits a wider beam and detects scattered reflections.

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Break-beam sensor

A sensor that uses a pair of emitter and detector devices to create a light beam that, when interrupted, triggers an action.

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Sensing distance

The maximum distance between the emitter and receiver of a photoelectric switch where it can reliably detect objects.

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Dark-on Switch

A photoelectric switch that triggers when light is blocked from reaching the sensor.

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Light-on Switch

A photoelectric switch that triggers when light reaches the sensor.

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Reflective Opto-sensor

A type of photoelectric sensor that uses a reflected beam of light to detect objects.

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Photocell

A light sensor that changes resistance based on light intensity – brighter light means lower resistance.

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Potentiometer

A variable resistor that allows you to control the amount of electrical current flowing through a circuit.

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How does a Capacitive Proximity Switch work?

The sensor acts as one plate of a capacitor. When an object comes close, it changes the capacitance, which is detected and triggers the switch.

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How does an Inductive Proximity Switch work?

The sensor has a coil wrapped around a core. Bringing a ferrous object near changes the core's magnetic field, altering inductance and triggering the switch.

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What type of objects can a Capacitive Proximity Switch detect?

Capacitive proximity switches can detect both metallic and non-metallic objects.

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What type of objects can an Inductive Proximity Switch detect?

Inductive proximity switches can only detect ferrous (iron-like) metal objects.

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Typical detection range of Capacitive Proximity Switches

Capacitive proximity switches typically detect objects between 4 and 60 mm from the sensor head.

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Corner-cube Prism

A type of prism used in retro-reflective switches to reflect the light beam nearly parallel to the incoming beam.

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Diffuse-reflective Photoelectric Switch

A photoelectric switch where the light beam is reflected directly off the object being detected.

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Direct Reflection

The type of light reflection used in diffuse-reflective photoelectric switches where the light bounces directly off the object.

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Light On/Dark On Operation

A feature in photoelectric switches that determines when the switch is activated based on the presence or absence of light.

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Dark On Operation

The photoelectric switch is activated when the light beam is interrupted.

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Light On Operation

The photoelectric switch is activated when the light beam reaches the receiver.

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Detection Distance

The maximum distance at which a photoelectric switch can reliably detect an object.

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Study Notes

Cat Candidate

  • Image shows a cat sitting at a podium, likely in a political setting.
  • Text overlay suggests the cat is a candidate.

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Robotics Sensors Lecture 3 PDF

Description

Test your knowledge about the whimsical world of political satire featuring our furry friends! This quiz challenges your understanding of humor in politics through the charming image of a cat as a candidate. Are you ready to vote for the cutest candidate?

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